Weihrauch HW77

Weihrauch HW77K Air Rifle, part 1.

Weihrauch HW77K Review

There’s a better than even chance that you are reading this article as part of researching the Weihrauch HW77K with the view of purchasing either the HW77K, HW77 or the HW97K springers. This is the 1st of 4 articles on the HW77K Springer  range and will deal with the .177 calibre specifically, with each of the other 3 articles concentrating on a different calibre and other aspects of this model air rifle.

The Weihrauch HW77K comes in 4 calibres, .177, .20, .22 and .25 calibres. In Australia, the .177 and .22 calibres are the predominant sizes with a wider range of pellets being available in these 2 calibres.

You like the airgun, now where to buy it?

At Gunroom I stock the entire range of Weihrauch air rifles that are bought into Australia; that is, I have them here in stock and on the floor 95% of the time. I get a lot of feedback and enquiries about the handling and accuracy of Weihrauchs whereby it is usually about a rifle that has been supplied by another dealer, untested and right out of the box. Hence, I undertook to target test EVERY Weihrauch that I sold to minimise the time spent answering phone calls and emails about issues with new air rifles, pellet selection or accuracy issues.

Complaints about the HW77K often stated that the owner was disappointed with the accuracy and when quizzed by myself, I am told that they are using some obscure and often cheap pellet type. The issue is with pellet selection and not the rifle in 99% of cases, regardless of the make of air rifle. Pellet selection is CRITICAL.

For the last 48 months, I have tested each Weihrauch air rifle against a minimum of 6 pellet types. If I am unable to get a suitable group then I expand the pellet selection until I find at least 2 good performing pellets for that particular gun. The new owner is then given the pellet selection spreadsheet, graphs and target scans so that they can see the performance of each pellet tested. I must state here that this is a pellet selection test only on new Weihrauch air rifles that I sell and is not a tuning cycle to improve the accuracy each air gun. I have recently as December 2018, reviewed and changed to testing we do on an air rifle. We still test them, but differently than previously stated.

For those of you who are new to airguns, let me say this much: no matter who has manufactured an air rifle, be it Weihrauch, Cometa, Daystate, Brocock or Air Arms etc., etc., there is no one pellet that suits every gun or model. Every barrel is different and as such, they perform differently with pellet types and even pellets of the same type. There are some competition pellets that do perform well across the board in Pre-Charged Pneumatic (PCP) air rifles, but these are usually after speed/power adjustments are made to obtain the efficiency.

As I test air rifles every day I have noticed specific pellet types that do perform well in these air rifles, such as H&N Baracudas, H&N Baracuda Hunters, H&N Field Target Trophy, JSB Exact Heavy and JSB Exact Jumbo Monster. However, this is not a given and it is not unusual for me to test 2 Weihrauch air rifles, one serial number apart, to find that the best performing pellet in each gun is different due to slight variances in the barrels and mechanisms.

By testing each Weihrauch I sell, you can be assured that when you get the rifle it will come with a test sheet (as below, if requested) and the recommended pellets for YOUR air rifle at the time of sale. This does come with a caveat, and that is that the Weihrauch air rifles take at least 1500 – 2000 shots before they are ‘run in’ so to speak, at which time I would, as an owner, retest the air rifle against some more pellet types while only sticking to quality pellets. Pellet selection is paramount to quality results, or as they say, “crap in, crap out”.

HW77K Pellet Test Sheet.

This following Test Result image is displaying a range of 10 pellets shot from a Weihrauch HW77K air rifle and one should immediately notice that in this particular Weihrauch HW77K, the H&N Power pellets did not perform at all in fact. The Pellet selection testing is usually done with only 3 pellet types and expanded should I not find 2 pellet types that group well. In the HW77K case below I tested 10 pellet types using 6 shot groups to get the results.

This only goes to reiterate that pellet selection from a new rifle is a service that will save you both time and money going through the learning curve yourself. Had this client not had his Weihrauch HW77K tested prior to delivery and had he selected H&N Power pellets, you can just imagine how long and loud he would scream at the poor results, and may even blame the air rifle. Best leave it to me to do the screaming and test your rifle before I send it to you.

Weihrauch Pellet Test Results - table

Weihrauch Pellet Test Results graph - average fps

Weihrauch Pellet Test Results graph - energy ft lbs

Advantages and disadvantages of the Weihrauch HW77K in .177 Calibre.

I often get asked if the Weihrauch HW77K .177 calibre is good enough to shoot rabbits, pigeons and rats etc. Well, this is a contentious issue as the rifle is quite effective at killing large vermin like rabbits, but are you the shooter, accurate enough to do a one-shot kill?

In the UK where they have power restrictions on their air rifles and they are limited to 12 Ft. Lbs. of energy, the Poms have taken their shooting to the next level, and that is accuracy. So it is often seen on YouTube and on Forums guys stating that they take out Rabbits at (let’s say) 40 metres with a HW77K. I don’t discount this as some of the best air rifle shooters are Poms and while they are hopeless at Cricket, they do however perform well with air rifles.

In Australia where our air rifles come into the country predominantly in the FAC* versions, a large number of air gunners here seem to think it is the power that kills, when in fact it is placement. Put a .177 pellet in the right place when shooting a rabbit with a HW77K for instance, then you can be assured of a clean kill. What concerns me is that many Australian shooters lack the skills, patience and diligence to effect a clean kill and I see this as wounding more rabbits than are actually killed in one shot. This is due in part to the culture here that power and speed is everything, when in fact placement is really the key.

So, to answer the question about HW77K in .177 being good enough to kill rabbits, it is if you are a good shot, but if you lack the discipline to affect this style of marksmanship, then I suggest that you buy a .22 or .25 calibre air rifle. That way, if your shot is not placed that accurately, there is still a fair to a   good chance that the increased energy will in effect give you a one-shot kill on a rabbit, as long as you haven’t shot it in the foot or where-ever.

To my way of thinking, .177 is a great target calibre in a Weihrauch HW77K and effective on small vermin such as rats and birds while the .22 calibre is best reserved for larger vermin such as Rabbits. This is my opinion based on over 50 years of shooting with an air rifle and I am well aware of people who are quite effective in killing rabbits with sub-12 ft. lb. air rifles, but in the mainstream of shooters, the HW77K in .177 is less effective on large vermin when looking for a 1 shot kill. I feel that the .177 lacks the ability in a lot of cases to effect a large wound channel as does the .22 or .25 where they have more mass and energy.

*FAC stands for ‘Fire Arm Certified’ as the shooters in the UK have to get a Firearms licence for any air rifle with the power exceeding 12 ft. lbs.

Weihrauch air rifle construction.

Weihrauch air rifles such as the HW77 series, HW80 and HW97K are all on the heavy side when compared to some of the other manufacturers. This is a trade off whereby you are getting a high-quality German product at the expense of weight. It is not a big deal as some say it is, just get over it and concern yourself with the quality product that will last a lifetime with minimum maintenance.

The HW77K is available from Gunroom in the following guises as I can mix and match rifle stocks to give you the product that you want. For left-handers, I also keep several ambidextrous sporter style stocks that suit the HW77 and Weihrauch HW77K range, while the thumbhole stocks are already ambidextrous.

The following HW77K rifles and stocks are available ex-stock, in either Blue or Stainless (Nickel plated):

Weihrauch HW77K Blackline

Weihrauch HW77K Blackline Blue

Weihrauch HW77K Blackline Stainless

Weihrauch HW77K Blackline Stainless

Weihrauch HW77K Sporter 1

Weihrauch HW77K Sporter 1

Weihrauch HW77K Sporter 1 Stainless

Weihrauch HW77K Sporter 1 Stainless

Weihrauch HW77K Sporter 2 Stainless

Weihrauch HW77K Sporter 2 Stainless

Weihrauch HW77KT

Weihrauch HW77KT

Weihrauch HW77KT Stainless

Weihrauch HW77KT Stainless

Weihrauch HW77K Blue Laminate

Weihrauch HW77K Blue Laminate

Weihrauch HW77K Blue Laminate Stainless

Weihrauch HW77K Blue Laminate Stainless

Weihrauch HW77KSE Ambidextrous

Weihrauch HW77KSE

Weihrauch HW77KSE Stainless Ambidextrous

Weihrauch HW77KSE Stainless

The above range of HW77K air rifles is available at the time of writing this.

Summary.

To do a full HW77K review is not possible in one article so I have taken the liberty of putting further information such as break-down images of the springers, weights, sizes, Vortek tuning, performance and accessories, spread over the remaining 3 articles.

So, while you are researching HW77K air rifle, do not stop on this article as there is more information in the other articles that applies equally to this Weihrauch air rifle in .177 calibre as it does in the other calibres.

Author

Ian McIntosh

JSB EJH ed Pellet Test

Blog #32 Air Rifle Testing

New Air Rifle Testing.

Air Rifle Testing is quite a long and involved process. Due to the increase in sales we are left with little time for post-editing target images from pellet testing. I have had to modify the supplied test results but NOT the testing, which will remain as always. Bottom line guys, there are only so many hours to the day and past performance has shown that post editing is costing me in time that is best spent in other ways.

Spring Air Rifle Pellet Selection Test.

With Springers, I will fire a minimum of 50 shots to establish the best performing pellet for the air rifle under test. I will shoot a series of groups using a minimum of 6 pellet types and record the best group along with the pellet performance results. You will be notified of the best performing pellet and its output as follows:

Sample Pellet Selection Test for Spring Powered Air Rifles (aka Springers).

Testing air rifles and the results

Spring Air Rifle Test

There are NO images that accompany these results.

There are NO costs for this test.

The above is what you get with your air rifle.

 

Revised PCP Air Rifle Pellet Selection (January 2020).

All PCP air rifle tests with the exception of  Air Arms PCPs, will receive the following test results. The highlighted results in YELLOW indicate the best preforming pellet in the test.

Sample Pellet Selection Test for PCP Air Rifles.

Air Rifle Testing results

PCP Air Rifle Test

There are NO images that accompany these results.

There are NO costs for this test.

Daystate and Air Arms PCP Air Rifles.

With ALL Daystate and Air Arms PCPs purchased you will get the following spreadsheet, graphs and target images.

NOTE: Grouping is calculated on the SIUS Target System as the OUTSIDE Diameter of the group and NOT the Centre to Centre that some clubs and individuals use.

Sample Pellet Selection Test for Daystate (and Air Arms) PCP Air Rifles.

Daystate air rifle testing results

Daystate Air Rifle Pellet Test

The following Graphs accompany these test results:

Daystate Pellet Test Graphs

Daystate Pellet Test Graphs

The following SIUS Target Results are included:

Air Rifle Test #1

H&N Baracuda Pellet Test  

Air Rifle Test #2

H&N Baracuda Hunter Pellet Test

Air Rifle Test #3

H&N Baracuda Hunter Extreme Pellet Test

Air Rifle Test #4

JSB Exact Jumbo Heavy Pellet Test 

Air Rifle Test #5

H&N Terminator Pellet Test

Air Rifle Test #6

JSB Exact Jumbo Heavy Red Pellet Test

The above Format of results is available for ANY air rifle, be it a springer or PCP, for the charge of $106 including GST. This charge covers the post editing of the Target Images and Excel Results.

 Conclusion.

All Target results are what I am achieving with a brand-new air rifle that has no barrel leading or action bedding. There are many of you out there that will undoubtedly shoot better than I do (with eyes 69 years of age), so do not take these results as the best the air rifle will do. On the other hand, I have said this before, if you shake like a Moma at a Christening, then these results may be hard to emulate.

As these results refer to brand new air rifles, then expect the grouping to improve as the actions beds-in, barrel leads up and you, as the shooter, develops muscle memory attuned to the rifle over time. All these factors will go into improving the grouping as it is presented in the test.

The reader of this should also note that the results I give you, there is no need to stop there. You still have the options to size the pellets, lube them, try other pellets (that are not in the test results), tune the rifle by reducing the power, resetting the regulator and hammer spring etc., etc.

The air rifle, no matter what the cost, is sold as per factory default settings and these are NOT necessarily the best settings for each individual rifle, so be prepared to do some tuning should you wish to improve the grouping. Remember, these are Pellet Tests and NOT Tune ups of your new air rifle.

Author

Ian McIntosh

 

Air Arms FTP900 Air Rifle

Blog #31 Air Rifle Discounting

Air Rifle Package Deals Explained

Due to Gunroom’s Air Rifle expansion into other brands, our buying power has also increased, so we are constantly reviewing our Price List in an endeavour to stay ahead of the competition. The air rifle Price List will be online and updated as frequently as possible. We are attempting to put ALL our pricing online to save you calling us as this ties up not only the phones, but us physically as well. To get a quote for a package deal that includes a compressor, please email us rather than phone. This gives us a paper trail so we can follow the quote and later sale.

Air Rifle Discounts

We will be publishing package prices for an air rifle with a scope, and compressor etc., once the bulk of our orders arrive here. With more than 150 air rifles, 500 scopes, 100 high pressure compressors (built to our spec)  plus literally many 100s of accessories and more than 2 tonnes of pellets due, we will be chasing business.

Some of the new Mark IV scopes have arrived as I am writing this, so if a 3-18×50 SF appeals to you, please email Rob at rob@gunroom.com.au and he will be only too pleased to assist you.

Mark IV Scope 3-18x50SF

Mark IV 3-18x50SF

There are 4 basic options that apply to package discounting, and for those of you into crunching numbers, please work off the chart below.

Gunroom air rifle package discounts

Discounting spreadsheet at Gunroom

The exception to this discounting, is where we package a PCP air rifle, a Mark IV Scope, Mark IV Compressor, Mark IV Cleaning Kit, Mark IV Alpha Bi-Pod (Brocock), Gun Bag and 1000 selected pellets from a Pellet Selection Test. In the pre-selected package above, the PCP air rifles are also discounted.

This package deal includes the percentages above and further discounts the goods when purchased as a pre-tested package. To buy the accessories separately, even at the 7% discount, you would not be able to better the price. At the time of writing this, 2/5/19, we have guns in the air, scopes, compressors and other accessories en-route or at Customs.

As you may be aware, we have a large consignment of Kral PCP and spring air rifles due here and some of them will be packaged with our Mark IV accessories together with 1000 pellets. By having our own brand now (Mark IV) and through buying in bulk, our ability to discount is greatly improved, so please take advantage of these deals that are set to start in early June.

Kral Puncher Knight air rifle package

Kral Puncher Knight Bullpup PCP Air Rifle

This Kral Knight will be offered in a one-time package deal together with our Mark IV accessories.

 Testing.

From today, this is the testing template we will be using for all future air rifle purchases. Note that testing regimes will change from time to time along with pricing and are not included in a package deal unless specified.

Test #1.

This is the default test for ALL guns sold at Gunroom, whether to a customer or another dealer. This cost is built in to the air rifle prices.

The airgun is fired at our indoor range using a SIUS Target System and Chronograph. I will shoot a number of pellet types,  usually a minimum of 6 types, and select the best preforming pellet, after which I shall record the speed of that pellet.

As a customer, you will get a Test Result Sheet, that will have the following information only:

Spreadsheet Pellet Test 01

Pellet Test #1 Spreadsheet

You will not get the targets or the other pellet test results. This is the Basic Test that I do on EVERY air rifle as we have to extend the warranty of a lot of these rifles, so I do need to see that they meet specifications. This Basic Test applies to springers as well as PCP air rifles and used guns.

Test #2.

Test #2 is OPTIONAL and will provide you with a lot more information, and you would receive the following files (example only) at an additional cost of $106 including GST if you want to map your rifle’s performance.

Gunroom Pellet Test 03

Pellet testing spreadsheet 03

 

Gunroom Target Scan o1

Gunroom Target Scan 01

 

The above target image  is the format you will get, with a minimum of 6 images. You should note that the SIUS Target System zooms up the images by 300% and that the grouping (as  bottom right in image) is calculated as the OUTSIDE diameter of all 6 shots. This is irrespective of calibre, so when looking at the image above, all 6 shots were within 11.8 millimetres.

Test #3.

On occasion we may offer this test at a discount or even include it in a pre-package deal or new air rifle model. For those of you who want more information, then this package is available for $140 including GST.

Test #3 includes what is shown on Test #2, with images and spreadsheet and also includes a set of 6 Graphs and a Pellet Decay Test.  The graphs are self-explanatory and the Pellet Decay test shows the owner the resulting Bell Curve (aka parabolic curve). The Bell Curve is done with the best performing pellet from a full tank until the effective energy is in free fall. You will be able to see the number of shots you will get from your PCP  air rifle before it loses effective accuracy.

Gunroom Pellet Decay Test

Gunroom testing a PCP air rifle  Bell Curve.

Before you go thinking that $140 is too much,  please bear in mind that some air rifles such as 12 Fpe will get over 450 shots to the fill. The novelty of shooting 450 shots in succession has long worn off me…

This test option is only available when we have the time to do it. Pricing may vary on all tests, so please ask for confirmation when requesting a quote.

Air Rifle Accuracy

When you get a new air rifle, please do NOT expect to get the best out of it until you have put through maybe 500 – 1000 shots. It takes that much to settle springs, seals and triggers etc and to “lead” the bore. I have often found when doing a Pellet Decay test, that by the time I was well into the shooting, that the grouping was getting better and more consistent. Point made.

Air Arms Galahad Extra PCP in Black

Air Arms Galahad Extra PCP in Black

We have a few Galahad PCP air rifles in both Synthetic and Walnut in a package deal.

As for the ability of each customer, this changes dramatically from an ardent air rifle shooter who can group <7mm @25 mtrs to a guy who can only just hit an A4 target at that distance. So before you call me up and query the airgun’s performance, think it through.

It often worries me that a customer will purchase an air rifle of a high quality in an attempt to shoot better. So if your shooting is marginal, then tell us and we will not recommend something that is going to leave you wanting. It is in OUR INTEREST that you get the right air rifle that will fulfill your requirements. If you shake like a mama at a christening, then no amount of test targets from me are going to improve your lot, and that goes for buying an expensive PCP air rifle. It does not make you an accurate shooter unless you have developed a competency that you feel can be improved upon by a better air rifle, then by all means upgrade.

Author

Ian McIntosh

 

HW77K in pieces

Air rifle tuning at home – Part 1

Air Rifle Tuning Explained: Part 1

Air rifle tuning, such as a HW77K Weihrauch air rifle or other spring powered air gun, beats shooting a rifle in the factory “default” condition, which by most standards is pretty basic. There are a few prerequisites that need to be followed prior to diving in and stripping your Weihrauch air rifle with the view to tuning it.

  • Firstly, if you are a lousy shot, then save your time and money because a tuned air rifle will not make you a better shot and you won’t be able to blame the rifle…
  • If the air rifle is brand new then I suggest that you consider shooting around 1500 shots through it to bed it in. This will allow you to develop a shooting profile, consistent grouping (be it good or bad) and muscle memory. This is important because it will give you a datum to compare your tuning to the original performance of your air rifle.
  • You will need some basic mechanical aptitude and by that I mean you need to know one end of a hammer from the other…

Before you start on in, consider whether or not you feel you have the confidence and basic skill set to do a neat job. If not, then maybe you should recruit a mate who is more technically inclined, because tuning a HW77K needs a degree of competency. However, should you get stuck tuning an air rifle, you can always call me, and I can talk you through it, even if you purchased your air rifle elsewhere…. hmmm.

Air rifle tool requirements

Let’s look at what tools you will need here so that you do not get halfway and get stuck for lack of tooling.

  1. Metric Open end/ring spanner set up to 13mm.
  2. Ball Pein (aka Ball Peen) hammer 12 – 16oz (small to medium).
  3. Pin punches – Long Series 2.5mm, 3mm and 4mm will get you by.
  4. Metric Allen Key set to 6mm.
  5. Flat screwdrivers to suit the stock screws.
  6. A cradle of some kind to support the action and/or stock.
  7. Buffing machine (Bench grinder with Buffing attachment – see image below).
  8. Workbench (Kitchen Table/Dining Table would be nice when the wife is out shopping…) that is clean and covered with a cloth base to protect the rifle parts.
  9. Bench vice.
  10. Cleaning fluid – degreasing spray or mineral turps etc.
  11. Moly grease and a suitable oil.
  12. Several containers – 1 for parts to be cleaned, another for clean parts and a 3rd for tools etc.

Your workbench should be clean and covered with an old sheet or similar material to minimise stock scratching and making unsightly marks to the bluing. Do not use a blanket as it will leave fine strands on material sticking to oiled parts of your air rifle. You need a container for parts and good lighting as the bluing is easy to scratch and difficult to repair. Keep all your tools well clear of your air rifle as it is too easily mark your bluing or stock on some sharp edge of a wayward tool lying close by. This procedure will allow for cleanliness which is paramount when tuning an air rifle.

The buffing machine can be your typical bench grinder with the accessory spindle fitted to take buffing wheels. The images below show 2 buffs, the dark one is used for initial prep work using a fine compound like Autosol metal polish and the light coloured buff is an ultra fine cloth to finish the steel to a fine polish without anymore compound. I do NOT advocate using the bars of a compound often used with buffs as these can be a bit savage. Should you end up taking off too much metal (rather than just polishing it) it will prove to be an expensive exercise.

Fine Buffing wheel used in air rifle tuning   Ultra fine buffing wheel used in tuning an air rifle

                                         Fine Polishing Buff                                                                                Very Fine  Polishing Buff

Polish for air rifle tuning

Autosol Polish For Fine Work.

Stripping the Air Rifle

When tuning an air rifle, start by making sure the air gun is not loaded or cocked – this may sound kind of elementary but “empty” guns have killed more people than smallpox… not literally, but you can see where I am going with this. Just check the damn thing.

With the Weihrauch HW77K, turn the rifle upside down in a cradle that will support it leaving your hands free. Then start by loosening (half a turn will do) the small screw behind the trigger guard, then the main spigot screw in front of the guard and lastly the 2 opposing fore-end screws. With all 4 screws loose you can then remove them from the rifle and place them together with the fore-end washers into a container. Separate the action from the stock and place the stock away from your work area leaving the action clear of all tools and crap you may have on the bench.

Weihrauch HW77K Air Rifle stripped down

Weihrauch HW77K Air Rifle action out of the stock.

Using a 13mm metric open-end spanner, undo the spigot pin and spacer (numbered “1” in the image below) and place these in a container.

We can then continue the strip down the air rifle by first releasing the loading arm from the fore end detent by pushing in the button beneath the front of the barrel. Then select a 3mm pin punch or one close to the pin diameter which is just forward of the bridge mount which is attached by the 2 fore-end stock screws. In the image below it is numbered “2”. Cradle the action over a couple of wood blocks covered with towelling and tap through the pin. You can then lift the loading arm and disengage it from the action, placing it well away from the rest of the air rifle action.

When looking at the action of the HW77k Weihrauch Air Rifle cast an eye over the pins and you will see on one side the 2 pins that hold the trigger group have a recessed flat on one side of the action where each pin is located. This is the side you insert the pins when putting them back and this is the side they get pushed out of (pushed out from the other side).

The blued pressed metal slide is known as the anti-bear trap (“3”) which is designed to slide between the trigger pivot and action the moment the loading arm is released. The idea is to stop some clown from pressing the trigger when the loading arm is down in the loading position: this could result in some painful fingers if they are putting a pellet into the barrel at the same time. Don’t worry, it’s been done I know.

Next tap out the 2 pins (“4”) holding in the trigger group and put them aside in a container. This will allow you to remove the trigger group from the action. While the image below does not show it, the safety catch should be removed at this point together with its compression spring.

You should now have your rifle stripped to the following as shown in the image below.

Weihrauch HW77K (Nickel) initial strip-down.

Weihrauch HW77K Air Rifle (Nickel) initial strip-down.

Once you get to this point, clean everything away on your bench as you will need to pull apart the action next. Cleanliness in air rifle tuning, such as a HW77K does not stop at keeping the rifle clean. If you want accuracy and longevity in your HW77K or any air gun for that matter, keep your pellets clean too. The best way to do that is with a Pellet Pouch and not your grubby pockets.

I can’t stress this enough, and that is to work in a clean and well-lit environment with tools and other miscellaneous bits and pieces well away from your air rifle as marking it is just too easily done. For those of you who are familiar with pulling down air rifles, these points may seem a bit lame or even basic. However, I can assure you from the phone calls that I get, there are a large number of air gun owners who know nothing about stripping down an air rifle, let alone anything about air rifle tuning.

The next thing we need to do with the HW77K is unwind the trigger housing from the main body of the action. You should find this very tight and may well need to put a close fitting spanner end into the trigger group recess. When doing this, find a large spanner with a thickness very close to that of the trigger group, place it deep into the slot, then while holding onto the main body, strike the spanner so that it twists the trigger housing in an anti-clockwise motion. Once the trigger housing starts to move, I suggest that you undo it by hand while watching how much thread is still left in the housing. Once you get down to about 4 or 5 threads left (looking through the loading arm channel under the main body), it is time to place the air rifle down and fasten a clamp across it from the barrel end to the trigger housing end.

Do NOT unwind the air rifle trigger housing all the way by hand as it may fly out the end with a terrific force and if it hits you, it won’t do you any good at all.

On 12 Fpe air rifles the spring compression is such that you can, with some common sense, undo the trigger housing while pressing down while unwinding – this is done with the air rifle facing upwards at 90 degrees and you holding down the trigger housing while you unwind it. However, in the interest of getting you to safely unwind the two housings, I would prefer you to do it this next way as it is safer.

The safe way to disassemble a springer.

I use an Irwin sliding clamp as pictured and lightly oil each pad then tighten it gently holding the barrel end and trigger housing in the centre of the clamping pads. This is easily accomplished when laying the components down flat. Once you have taken up the slack in the sliding clamp and have applied a bit of pressure on the air rifle you can unwind the rest of the action without it flying apart.

I also put the rifle together using the reverse of this clamping method. See the Irwin clamp that I use, it has a 920mm opening and works very well. I purchased it from Bunnings for around $36 I think. This clamp is invaluable in air rifle tuning of many brands.

Irwin Clamp used when tuning a HW77K

Irwin Sliding Clamp With 920mm Opening.

The components.

Once you have separated the housings you should have the following on your bench that will require cleaning, inspecting and then polishing before being re-assembled.

Air Rifle Tuning components

HW77K Air Rifle in pieces.

Now you have got this far, the next thing we will move onto is Part 2 of this air rifle tuning article following: that will cover inspecting, actual polishing and assembly options pertaining to the Weihrauch HW77K air rifle. A lot of what I have here also applied to other airguns even though I am targeting tuning a HW77K Weihrauch.

Author: Ian McIntosh, Gunroom