Hunted with PP in an original SS for years in Alaska. Load was a 45-2 7/8" case, 550 grain PP bullet with a healthy dose of 1fg black. Shot two Dahl Rams with the load. One at a decent distance. That shot was a Texas heart shot. Bullet exited the chest. Over four feet of penetration.Worst part about using PP was the rifle weighted 11# 11 ounces. Not what you would call a mountain rifle.