I've played w/ one some, although not recently. Best accuracy I got was with Barnes 275 gn. XPB. over 40.0 gn of H110 but by the time I worked up the load I was out of bullets
(.75" @ 50 yd., 2175fps avg.) Easier on the pocket for playing with was the Hornady 300gn. XTP-mag over 40.0 gn. of Lil Gun (2250fps avg.). These shot around an inch @ 50 but opened up to 5" @ 100 yd.
Hornady factory 200gn were all over the place but clocked over 2800fps. Cast Performance 300 LBT's didn't shoot to well for me either. TC recommends Cor-Bon ammo.
Recoils not all that bad (and I don't like getting kicked) with the Limb-Saver pad. Give yourself some room to move though. I shot it once, off sticks, while sitting with my back against the wheel of my truck. That's as close as I've come to getting "Scope Eye".
Haven't shot any critters yet but any of these loads will sure blow the heck out of a Milk jug full of water.
