CCI definitely... MaxiMag 40 grain, jacketed, clocked out to, I think, 1875FPS. Definitely will do enough damage to close and finish off. If you are worried about a .22 doing through and through collateral damage...Federal Match ammo. all lead and and 1325 FPS.

DO NOT DO NOT DO NOT go for this greenweenie ALL TIN slug crap. 26 grain slug.. who in the hell they kidding?

Might as well shoot em with a old Daisy air rifle rated for 325 FPS and have done.