considering this is your "last defense" weapon. I wouldnt carry a pea shooter. I am looking at a Linebaugh .475 If ya gonna do it, do it right. Wy wouldnt allow us to carry a backup while bowhunting. You can however carry while trailing, leave the bow in camp! That or let someone else pack.

A 454 would be my next choice...many like the 44 mag around here.