The analogy ive been told is that the 454 with 325 aframes kills like a 375 hh on african plains game. Mine run around 1630 fps or so. The ones you listed with the exception of the bushbuck will be easy to get with a revolver. Go to the right property and rhe bushbuck will be easy as well. Ive seen all of the above mentioned animals at 30 yards or less with the exception of the bushbuck.