Air rifle power

[kamyonsofor]

Good morning ,I have just chrono'd I hope correctly my Hatsan AT44 .22 using Jsb 15gr did it twice 528 &531fps so am I right in the ftlbs is 9.39 ,conditions dry and carpeted toilet door still in 1 piece, come on Tac you should be up by now.

[T 20]

Good morning ,I have just chrono'd I hope correctly my Hatsan AT44 .22 using Jsb 15gr did it twice 528 &531fps so am I right in the ftlbs is 9.39

Yes

[Black Beard]

That seems a bit low but make sure it is charged at the right pressure. Too high and too low can reduce power and there is often a best pressure with (unregulated) pcps.

[angrybear]

As said above ref the pressure 20bar or so under max fill is a good place to be.

Also remember different pellets will be more or less efficient in any given barrel so try a few others before deciding it is or isn't too low.

[clunge]

I don't know of any JSBs that weigh 15gr.

If you were using Jumbo exacts, they weigh ~ 15.89gr, Which puts your output at 9.95fpe.

[kamyonsofor]

Hi one and all thanks for the input,pressure well within the green, barrel nice and clean and the pellets were jumbo's 15.89's so time to screw it out anti clockwise .