I use a 30fpe .22 and kill at 80mtr I'm at abt 890fps and get 70 shots a fill
My friend uses FX impact .22 at anything between 50-100fpe
He kills at 120mtr with slugs not pellets as they don't group after 900+FPS and gets abt 120+ shots a fill
Now that is worth having fac in aur rifle.
It's not about the power it's the accuracy so you tune your gun to the sweet spots it likes.
Up or down just 1fpe can alter your group. But if messing about and you'll be grouping at silly ranges.