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The Brocock Compatto .22 FAC, part 1 of 4.

I will be doing a series of reviews on the Brocock Compatto PCP air rifles in .177, .22 and .25 calibres in FAC guise in the near future. This 4 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.

Gun Room will also wholesale the Brocock Australia wide to genuine gun dealers.

Please note here that the Brocock Compatto tested was straight out of the box without a shroud 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 over-view of the 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.

The Compatto with the MTC Viper-Pro.

The test rifle was fitted with a 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.

MTC Viper Pro

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.

The Pellets Tested in the Brocock Compatto.

The following pellets were tested in the 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 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.


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

Average Speed 747.9 F/S

Energy 26.26 Fpe


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

Average Speed 794.0 F/S

Energy 22.91 Fpe


JSB Exact Jumbo Heavy

18.13 Gr x 5.52mm

Standard Deviation 3.8 Ft

Highest Speed 806.5 F/S

Lowest Speed 794.5 F/S

Extreme Spread 11.9 Ft

Average Speed 800.5 F/S

Energy 25.80 Fpe


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

Average Speed 859.3 F/S

Energy 24.04 Fpe


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

Average Speed 696.8 F/S

Energy 22.8 Fpe


H&N Hornet

  1. 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

Average Speed 822 F/S

Energy 24.01 Fpe


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

Average Speed 837.7 F/S

Energy 24.78 Fpe


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

Average Speed 793.2 F/S

Energy 26.68 Fpe


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

Average Speed 790.8 F/S

Energy 25.29 Fpe


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

Average Speed 651.9 F/S

Energy 23.97 Fpe


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

Average Speed 666.3 F/S

Energy 25.05 Fpe


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

Average Speed 904.55 F/S

Energy 22.44 Fpe

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

Compatto Energy Decay Test in High Power Mode.

Shooting the 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 inletting in the stock with what looks like maybe an acrylic composite used like 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 Compatto for these articles, I went through over 600 pellets in 2 days and the rifle was flawless. On High Power Mode the 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.


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.


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


Please note that the 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 in 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.

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


Standard Deviation               4.2 FtCompatto-Target-1

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:

Standard Deviation               2.7 FtCompatto-Target-2

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.

Standard Deviation    10 FtCompatto-Target-3

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.

Standard Deviation                21.8 FtCompatto-Target-4

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.

Standard Deviation               32.9 FtCompatto-Target-5

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).



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


Summary on the Compatto 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 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.

Author: Ian McIntosh

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