Any of the "big three" auto pistol calibers would be a good choice for your intended use. Bullet choice is what will make the difference.
Ball ammo may not produce enough of a wound channel on the 2 legged's.
HP's may not penetrate enough for the 4 legged's.
A SWC, TCFP, or RNFP solid bullet should put you right where you want to be.
A reliably feeding bullet among those choices in that order is what I'd take. Gun familiarity would trump buying a new one simply for a different caliber.
Ball ammo may not produce enough of a wound channel on the 2 legged's.
HP's may not penetrate enough for the 4 legged's.
A SWC, TCFP, or RNFP solid bullet should put you right where you want to be.
A reliably feeding bullet among those choices in that order is what I'd take. Gun familiarity would trump buying a new one simply for a different caliber.