The SP101 is a great outdoor carry gun. It will chamber even Buffalo Bore 180 grain hard cast gas check rounds with room to spare.
I have that exact handgun and wondered about using the Buffalo Bore 180's in it....
Have you shot yours with the 180 load? If so, how was it.
Thinking that would be a nasty black bear self defense rig, so loaded.
I have a handfull of the old Black Talon 180's that I use in it now and it handles them just fine. Recoil is there, but it's very tolerable - not at all like that of the 125's