WB
I’ve loaded some 200 gr. RCBS .358” in
Monday, February 02, 2026, 12:06

.38 Spec. cases to .357 OAL. It’s pretty serious recoil even at 900 fps. Ditto the 173 gr. Keith Thompson SWC. I think I used about 5.5 gr. Unique, check on that. The traditional 158 gr. SWC is hard to beat at around 1000-1100 FPS. Lil’gun can get you there with low pressure, but I’d want magnum primers.

I too have a SP101 .357. I think you’d holler quit way before it toon on any wear. If figure it’s more stocky than a K-frame by my figuring.