I'm looking for a bullpup .177 airgun to target shoot and some light pest control. Does anyone have experience with the Benjamin Akela?
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My Akela trigger is great and I've done nothing to it, other than adjust it a little. I did add a Huma Air Regulator and shortened the hammer spring by ⅜" and it shoot really well. Just shot my first rat with it yesterday, it was quite the sight! I got it during the Thanksgiving sale also, and so far I'm quite happy with it.
As your Akela is .22, I recommend shortening the stock 3.5” hammer spring to 2.9”. My Cayden .22 is currently 2.8”. The “magic” in shot string improvement seems to happen once you shorten the hammer springs below 3.0”. I tried 3.25” for example and still had a steadily declining shot string from full fill. These guns definitely seem “oversprung” from the factory. The other great thing about shortening the hammer spring is that now your hammer spring adjustment screw is usable to tune power. Basically everyone who has these Cayden Kratos Akela rifles has the hs adjuster backed all the way out - because the spring is too “strong” at stock 3.5” length. Once you shorten the spring, you can turn the hammer spring adjustment screw in to increase power, and still get a longer, flatter shot string. I think the way to set these guns up is to (1) have the power adjuster full open (2) pick the heaviest pellet you use - say 18.13g (3) use the hammer spring adjustment screw to get the pellet speed where you want it for best accuracy. Then when using lighter pellets, say 15.89 grain, you can simply turn the power adjuster knob down (using it as essentially a transfer port restrictor) to keep your pellet speed in the optimal accuracy range (typically somewhere between 820 and 900 fps). The shot string improvement in my .177 Akela was insane. My Cayden now gets 50-60 shots with a spread of less than 30fps - depending on pellet and power used. I had the Cayden .22 at 75 shots using a shorter 2.57” spring, but I then had to wind the hammer spring in close to max (before spring bind) to get 18 grain above 900fps. So, each gun will be different, but I think the optimal hammer spring for a .22 in these rifles is a length of between 2.5 and 3.0 inches - recommend you gradually snip it down until you get the shot string that you want.