Those 22 cal. Crosman 14.3 gr. hollow point premiers are the same ones I use most in a Benjamin Trail 22. They can take squirrels cleanly but not always. They chrono at an average 816 fps from that Benjamin with the Nitro Piston 2 system. I try to limit it to 25 yards, about 30 is the most I ever got a squirrel at, (and that took 2 rounds). Any further than that becomes 22LR territory for me. I've never noticed much sensitivity to hold with this one. I did notice that I really like that thumbhole stock for shooting offhand. I wonder if your RWS is really getting the advertised 900 fps? Be nice if you could chronograph it; but I'd at least try some different pellets. But if you can get at least 816 fps from those Crosman Premiers I'd vouch for their effectiveness on squirrels out to about 25 yards.
