For this role, I like a moderately loaded big bore all over the .357. It will do the job without making my ears bleed. So anything that propels a 240-260gr cast bullet to 900-1000fps (.44Spl, .44-40, .45ACP, .45Colt) out of a relatively light sixgun is plenty. A Colt-sized single action or N-frame usually gets the nod but I'm really digging the new half lug .44Spl GP-100.