I had a SBH,well, two of them, for years. I also have tendonitis in my right elbow, and it got to the point where 25 rounds in the single action whold cause excruciating pain. Curiously, I also own a 9.5 inch SRH in .480 Ruger that I stoke with 400 gr. cast bullets and 21 grains of H110. It was nothing to fire 100 rounds a session from it.
A LIGHT came on in my head!
I sold the SBH and bought a 7.5 inch SRH in .44 mag.
The DA grip is very different, and causes the recoil to be felt differently,not to mention the added weight.
I'm back to 100 rounds per session with my .44!