Spring piston airgun, maximum power today?

[Frogy]

I know the thread said spring piston. But my Hw90 22 call shooting a16 gr around 777 fps is 21 fpe. And the 18 gr around 700 fps is is 20 fpe That’s with gun pressure set at 19 Bar and it’s a tac driver Lol not my everyday shooter. just felt the red headed stepchild of the HW line needed represented

 

[W.R.Buchanan]

FPE on HW80 according to Pyramyd's FPE Calculator is 23.75 with JSB 18.4 gr pellets /760 fps

 

[Frogy]

FPE on HW80 according to Pyramyd's FPE Calculator is 23.75 with JSB 18.4 gr pellets /760 fps

Don’t own an 80 but 760 seems fast with an 18gr pellet. In my research that’s a 14 gr pellet speed But I don’t own one so can’t run it through the chronograph

 

[DualMagMike]

FPE on HW80 according to Pyramyd's FPE Calculator is 23.75 with JSB 18.4 gr pellets /760 fps

R1 .22 factory rating was I believe 765fps and they usually tested with Laser pellets =17.41fpe You can also check this out> https://www.pyramydair.com/blog/2012/08/the-beeman-r1-supermagnum-air-rifle-18-years-later-part-1/

 

[Deerstalker]

FPE on HW80 according to Pyramyd's FPE Calculator is 23.75 with JSB 18.4 gr pellets /760 fps

FWIW, My SWAG is 23.6 FPE. FPS squared times pellet weight divided by 450240 = 23.60 FPE