Rated ammunition speeds Vs reality
Does anyone have a good handle on real world FPS speeds of 22lr ammo (vs what it claims on the box), ideally from a 12 inch barrel?
I'm trying to find a small sweet spot just below subsonic out of my dedicated AR22 12 inch barrel, but enough kick to cycle my action with minimal chance for malfunction even when dirty.
So far I know that RWS high velocity 40gr HP (1250fps) is below the sound barrier, and unfortunately CCI AR tactical 40gr (1200) is above. Does anyone have any recommendations?