I've had two SP101s, only have the 3"er right now. My attitude is that if I'm going to carry a .357, I'm going to run hot loads for self defense and I use Buffalo Bore 158 gr JHPs. They run about 1320 fps in my gun.
The factory grips hammer my middle finger (can't do without your middle finger when driving
I found the rubber Hogues to be vastly more comfortable, middle and all other fingers are fine. Don