Retar’d LE. Kinesthetic dufus.
Don’t tread on volcanos!
In regard to the damage to the web of the hand at the base of the thumb, I had that problem with my SP101 shooting magnum loads. I decided that the problem was that the circumference of the original grip was too small, it needed to be greater to keep my
hand away from that corner of the frame in recoil. I tested that by wrapping the grip in layers of electrical tape to increase the circumference to about the same as the GP100 compact grip. Worked like a charm, no more web damage.
I've never had that problem with any of my GP100s with Ruger or Altamont grips. In any event, the fix would be a grip that covers that corner of the frame, or moves the hand out away from it. The Ruger compact grip is slightly smaller in circumference than the full size so I doubt it would help unless it lowers the position of the hand further away from the frame. A glove would obviously help. One other thing that occurs to me is a stronger, more aggressive grip on the gun. The more you keep the muzzle down, the less that frame corner is going to pivot up and come back against the thumb.
Why not just shoot target loads, it's easy on you and the GP. I never shoot anything over 1000 fps. That's why I have a 1989 GP with probably 35,000 rounds on it that works like new.
Also, if I were to carry this with .38 Special +P's, what are the best loads for a 4" barrel service size revolver? I have about a hundred rounds of Remington 158gr LSWCHP +P I bought when I bought my 64-3 earlier this year, but are there more modern loads that would be better? I remember @Chuck Haggard recommending the Gold Dot 135gr +P Short Barrel even for 4" revolvers, but I can't find that stuff in stock anywhere. I do see that the 125gr +P Gold Dot is available, but I can't find any testing or information on it.
Oh ok. I don't think I could do that even if I wanted to.
One thing I do like about revolvers is that it forces me to slow down and really pick my shots. At times I find it hard to justify carrying a 6-7 round all steel 4" barrel gun when I have 15-17 shot 9mms and 12-13 shot .45's, but if there is some increase in effectiveness with a good .357 Magnum loading, it helps, along with not having to worry about the kinds of malfunctions in actual shootings one sees in police bodycam videos, especially in vehicles (where I spend a lot of my time).