I have shot close to 8,000 Berry's 158 rnds bullets over the last three years in a model 627 / 8 shot. The load I use is 4 gr. of tight group with a medium-to heavy crimp, this load has very mild recoil in my heavy N-frame, but never fails to take down the heavy steel poppers (if I do my part) that our club uses. The best part that the chambers stay crud free, and I can shoot several matches without cleaning the gun. I can highly recommend this load for any Smith that is +P rated.