Same as Old griz; whatever trips my trigger or what I'm carrying at the time. However, I always carry a handgun when hunting coyotes (calling) and if the conditions are right at the call site I will pull out the handgun to use if the yote comes in real close (50 yards or under). I have used the .32 H&R, .357, .41, .44 Special and Magnum, .45 ACP, .45 AR and .45 Colt. I have used hardcast bullets but prefer a high steppin' lightweight HP/FP in each of the above. For example; with my .357 6" barrel Security Six I use a 125 XTP at 1690 fps. That's not your every day plinking load but it does interupt yotes whole day when used.
Larry Gibson