Brocock Compatto

1. The Brocock Compatto .22 FAC, part 1 of 3.

Brocock Compatto Review, part #1.

I will be doing a series of reviews on the Brocock Compatto PCP air rifles in .177 and .25 calibres in FAC guise in the near future. This 3-part article will, however, include pellet selection testing in all 3 power levels, pellet speed decay graphs and the suitability of MTC scopes. For now, we are starting with the popular Compatto .22 calibre review. This series will be followed by tuning the Brocock Compatto, fitting a regulator and advanced pellet preparation to make this exceptional PCP air rifle even better.

Buyers of new PCP air rifles from me now get the Pellet Selection Test sheet (see Blog #21) where I test 6-8 different pellets with the said air rifle at no cost. In this article, I will show you the outcome when testing 12 different pellets in the Brocock Compatto in .22 calibre and what we can learn from the results.

Gunroom Pty Ltd will also wholesale the Brocock Compatto Australia wide to genuine gun dealers.

Please note here that the Brocock Compatto tested was straight out of the box without a working shroud (cosmetic only) and with no adjustments made to it. The pellets were also straight out of their respective tins, complete with minor dents and imperfections found in most tins of pellets purchased here in Australia, especially JSB pellets marketed by Cometa.

It would be fair to say that these results are a generic overview of the Brocock Compatto in .22 calibre. I have tested several other .22 Compattos and their results were very similar in that several of the same pellets excelled while others failed to deliver. This is a typical story throughout air rifle testing where PCPs actually deliver more consistent pellet results across a broader array of pellets than do springers.

Brocock Compatto with the MTC Viper-Pro.

The test Brocock Compatto was fitted with an MTC Viper-Pro 5-30×50 Scope that performed flawlessly throughout all the tests I did and as a result, I would highly recommend this combination. Testing was done over 25 metres in sometimes gusty conditions that resulted in groups slightly right of the centre.

Brock Compatto mounted with an MTC Viper Pro scope

MTC Viper Pro 5-30×50 Scope

The Viper-Pro comes with an illuminated reticle operated by a step-less rheostat that illuminates the “square” around the centre, so as not to obscure the reticle centre that is quite often a hindrance rather than an asset in some other illuminated scopes.

Brocock Compatto and the Pellets Tested.

The following pellets were tested in the Brocock Compatto with the Baracuda used to zero the rifle at 25 metres. No adjustments were made following the zero being obtained so as to demonstrate the performance characteristics of different groups relative to the H&N Baracuda.

After zeroing the scope I shot the following pellets with the results in the adjoining images together with Chronograph results under the target images. I topped up the rifle every 18 shots (3 targets of 6 shots each). Initially, I have put up 12 results using both H&N and JSB pellets and will add more pellets to this article when time allows me to transfer my remaining notes to my computer.

Reminding you here that all these results are stock standard out of the box results that will be followed with the Mid and Low Power levels in the same format in coming articles. Once I start the series on tuning, references can be made to these results that will allow you an instant and comprehensive understanding of any benefits obtained when carrying out a tune on a Brocock Compatto.

The following results were obtained in a temperature of 24.5 degrees C, a humidity of 55% and a cross-wind left to right varying between 6 and 18 kilometres an hour at an altitude of 30 metres above sea level.

Brocock Compatto Baracuda Target results

Baracuda Target Results at 25 metres

H&N Baracuda

21.4 Gr x 5.50mm
Standard Deviation 2.7 Ft
Highest Speed 751.5 F/S
Lowest Speed 743.8 F/S
Extreme Spread 7.6 Ft
Energy 26.26 Fpe
Average Speed 747.9 F/S


Brocock Compatto and Terminator Results

Terminator Target Results at 25 metres

H&N Terminator

16.36 Gr x 5.50mm
Standard Deviation 11.8 Ft
Highest Speed 807.6 F/S
Lowest Speed 773.6 F/S
Extreme Spread 33.9 Ft
Energy 22.91 Fpe
Average Speed 794.0 F/S

Brocock Compatto Field Target Trophy Target

Field Target Trophy Results at 25 metres

H&N Field Target Trophy

14.66 Gr x 5.53mm
Standard Deviation 9.4 Ft
Highest Speed 870.3 F/S
Lowest Speed 844.2 F/S
Extreme Spread 26.1 Ft
Energy 24.04 Fpe
Average Speed 859.3 F/S

Brocock Compatto Baracuda Power Target

Baracuda Power Target Results at 25 metres

H&N Baracuda Power

21.14 Gr x 5.50mm
Standard Deviation 6.8 Ft
Highest Speed 710.3 F/S
Lowest Speed 688.9 F/S
Extreme Spread 21.3 Ft
Energy 22.8 Fpe
Average Speed 696.8 F/S

Brocock Compatto Hornet target results

Hornet Target Results at 25 metres

H&N Hornet

Gr x 5.50mm
Standard Deviation 7.0 Ft
Highest Speed 830.6 F/S
Lowest Speed 811.5 F/S
Extreme Spread 19.1 Ft
Energy 24.01 Fpe
Average Speed 822 F/S


Brocock Compatto JSB Exact Jumbo Target results

JSB Exact Jumbo Target results at 25 metres

JSB Exact Jumbo

15.90 Gr x 5.52mm
Standard Deviation 3.3 Ft
Highest Speed 843.1 F/S
Lowest Speed 834.2 F/S
Extreme Spread 8.9 Ft
Energy 24.78 Fpe
Average Speed 837.7 F/S


Brocock Compatto Hunter Extreme Results

Hunter Extreme Target Results at 25 metres

H&N Hunter Extreme

19.09 Gr x 5.50mm
Standard Deviation 7.6 Ft
Highest Speed 802.5F/S
Lowest Speed 780.5F/S
Extreme Spread 21.9 Ft
Energy 26.68 Fpe
Average Speed 793.2 F/S


Brocock Compatto Baracuda Hunter Target Results

Baracuda Hunter Target Results at 25 metres

H&N Baracuda Hunter

18.21 Gr x 5.50mm
Standard Deviation 4.6 Ft
Highest Speed 797.9 F/S
Lowest Speed 784.7 F/S
Extreme Spread 13.2 Ft
Energy 25.29 Fpe
Average Speed 790.8 F/S


Brocock Compatto JSB Ultra Shock Heavy Target Results

SB Ultra Shock Heavy Target Results at 25 metres

JSB Ultra Shock Heavy

25.4 Gr x 5.52mm
Standard Deviation 4.1 Ft
Highest Speed 657 F/S
Lowest Speed 646.3 F/S
Extreme Spread 10.7 Ft
Energy 23.97 Fpe
Average Speed 651.9 F/S


Brocock Compatto JSB Exact Jumbo Monster Results

JSB Exact Jumbo Monster Target Results at 25 metres

JSB Exact Jumbo Monster

25.40 Gr x 5.52mm
Standard Deviation 3.5 Ft
Highest Speed 670.6 F/S
Lowest Speed 662.5 F/S
Extreme Spread 8.0 Ft
Energy 25.05 Fpe
Average Speed 666.3 F/S

Brocock Compatto Baracuda Green Target Results

Baracuda Green Target Results at 25 metres

H&N Baracuda Green

12.35 Gr x 5.50mm
Standard Deviation 7.2 Ft
Highest Speed 916.3 F/S
Lowest Speed 897.2 F/S
Extreme Spread 19.1 Ft
Energy 22.44 Fpe
Average Speed 904.55 F/S


As can be seen from the above images of various pellet results, pellet selection is critical for not only accuracy but down range energy as well. One issue I find when tuning PCP or spring air rifles is that sometimes the customer then accepts whatever pellets that his local Gun Dealer recommends (because he has them in stock primarily) and then complains that his gun has gone off the tune. Duh…

I would suggest to buyers of new PCPs that once you have selected a pellet that performs for you, stick with it for at least 2000 shots. After that, I would then go ahead and compare the top rated 3 or 4 pellets from your initial Pellet Selection test and only then would I swap pellets if another was found to perform better. Should the pellets you are using be doing the job, then swapping them out is not really warranted and your time would be better served spent on your rifle. As they say: “If it is not f*cked, don’t fix it.”

Brocock Compatto end view

Brocock Compatto .22 Calibre with MTC Viper Pro 5-30×50 Scope

Brocock Review: Energy Decay Test in High Power Mode.

Shooting the Brocock Compatto air rifle is a pleasant experience due to the exceptional balance, short overall length and comfortable synthetic stock. I think I should mention here that the Compattos are nested very neatly into the in-letting in the stock with what looks like maybe an acrylic composite used as a glass bedding compound. However they have done it, it works well and results in the rifle only needing one bolt to secure the action into the ladder frame stock.

When shooting the Brocock Compatto for these articles, I went through over 600 pellets in 2 days and the rifle was flawless. On High Power Mode the Brocock Compatto returned just over 40 shots that would be considered accurate. I fired 10 shots per target for the Pellet Decay Test and chronographed the results using the JSB Exact Jumbo Heavy pellets.

Brocock Compatto Magazines

Compatto Magazines showing the “Empty” indicator being a Red Dot.

Shooting this many pellets in a couple of days I got to know the rifle pretty well and found that the side bolt action very positive and easy to use. The magazines performed without a hitch and loading them was also quick and easy unlike some of the plastic spring loaded magazine covers that have found their way into some PCP brands. The Brocock magazine is all aluminium and pellets are dropped in the right way around and then rotated to the next chamber.

Brocock Compatto Bolt Action

The Brocock Compatto Loading Bolt up close with the Power Selector shown under the Logo.

Please note that the last day I fired these 10 shot strings, the temperature was 32 degrees, humidity 18% and a gusting breeze of 4-6 kilometres an hour. My first shot was at the bottom of the red and so I finished the string all through the same hole. I then adjusted the scope for the next string. Normally I would have restarted the shot string but decided to leave it so you can see the drop of the pellet from the earlier results from the day before. Nothing was adjusted between both shoots with the weather contributing to the anomaly shown.

When I finish the article on Pellets I will expand on the anomalies that one can expect with changing weather conditions as I experienced doing the 10 shot per target Decay Tests.

1st of the 10 Shot Groups starting off with a full cylinder at 200 Bar. (the Cylinder Charge has now be updated to 240 Bar)

For the 10 shots in this 1st target the Chronograph gave me the following results:

Brocock Compatto Target #1

Target Shots 1 – 10

Standard Deviation 4.2 Ft
Highest Speed 808.4 F/S
Lowest Speed 972.7 F/S
Extreme Spread 15.6 Ft
Average Speed 799.9 F/S
Energy 25.8 Fpe


Adjusted the scope for the balance of the energy decay test.

Following are shots 11 through to 20 below.

For the 10 shots in this 2nd target the Chronograph gave me the following results:

Brocock Compatto Target #2

Target Shots 11 – 20

Standard Deviation 2.7 Ft
Highest Speed 815.3 F/S
Lowest Speed 804.2 F/S
Extreme Spread 11.0 Ft
Average Speed 811.2 F/S
Energy 26.5 Fpe

Shots 21 through to Shot 30 Below.

Brocock Compatto Target #3

Target Shots 21 – 30

Standard Deviation 10 Ft
Highest Speed 804.9 F/S
Lowest Speed 772.3 F/S
Extreme Spread 32.6 Ft
Average Speed 788.5 F/S
Energy 25.0 Fpe

Shots 31 through to Shot 40 Below.

Brocock Compatto Target #4

Target Shots 31 – 40

Standard Deviation 21.8 Ft
Highest Speed 767.9 F/S
Lowest Speed 699.0 F/S
Extreme Spread 68.9 Ft
Average Speed 736.6 F/S
Energy 21.8 Fpe

Shots 41 through to Shot 48 Below.

Brocock Compatto Target #5

Target Shots 41 – 48

Standard Deviation 32.9 Ft
Highest Speed 695.9 F/S
Lowest Speed 590.6 F/S
Extreme Spread 105.3 Ft
Average Speed 647.3 F/S
Energy 16.9 Fpe

As can be seen from the target above, the decay in energy (relative to speed) is evident after shot 41 or thereabouts. The Graph below shows the individual shots from start to finish in both Energy (Fpe in Red) and Speed (F/S in Blue).

Compatto Shot Count Graph

Energy and Speed Decay Chart for the Brocock Compatto in .22 cal.

Brocock Compatto Summary in High Power Mode.

The Brocock Compatto enters the PCP field in direct opposition to the Weihrauch HW100TK (Carbine version of the HW100) where they both share similar speed/energy outputs but that is where it ends.

The Brocock Compatto has 3 power levels and has a price tag between $500 and $700 cheaper than the HW100TK depending on which model we are comparing it to. As the Brocock Compatto has a synthetic stock that is well balanced and short, it lends itself to hunting and vermin control where size does matter, especially when controlling vermin in sheds in low light and around machinery. The fact that this PCP has 3 power levels allows the vermin shooter who is chasing anything from rats and mice in sheds and around machinery to foxes in woods and paddocks where he has a power level to suit.

Those of you who shoot rats and pigeons in farm sheds know the limitations of a PCP air rifle that is too powerful; one miss and the pellet invariably puts a hole in the tin. The low-level power setting allows the shooter sufficient power for close work without the worry of putting holes in the cladding or damaging machinery in and around a shed or farm.

As for competition shooting, with a PCP air rifle that shoots this well out of the box and that has yet to be tuned, I would say this air rifle would not disappoint the avid competitor. At the current price, it will also allow new competitors into the Field Target shooting at an affordable cost and still box up to target rifles costing many times more.

The interest in PCPs has shifted somewhat with a rapidly growing following of the Brocock Compatto where its price is not only very competitive with PCPs like the Weihrauch, but it also costs around the same price as a quality tuned spring air rifle. I can see this semi-bullpup Brocock Compatto penetrating the market on not only PCPs but larger spring air rifles as well.