If you' re hitting well with it, go for it, I' d use an all lead bullet like a keith or round nose, but if you' re hitting well with it, and understand the range capabilities of it, then there' s no reason you shouldn' t be able to...I' ve used .45acp in a thompson ondeer, great results, no, it' s not the same thing, but the bullets perfromed really well, I' d have faith in an accurate 1911 out to 20-30yrds with a good bullet and fairly heavy loads (nothing over pressured, but close to max), which I' ve used on coyotes to 75yrds and to put down sick cattle and buffalo, I don' t see any reason you shouldn' t be successful as long as you can insure ahead of time you' re going to hit what you' re aiming at.