It’s actually where my hand meets the grip. I think it’s the rubber grip sticking to me and tearing at the skin a bit when it moves under recoil, if that makes sense. I may also have been pinching my skin against it with the clamp grip I was using, which wouldn’t help. Grip is something I’m going to need to work on a lot with a gun this light. Ammo was mostly light handloads but also a good amount of factory FMJ that was stouter.
The cylinder release is happily not an issue. That’s probably the biggest benefit of the LCR for me. I haven’t shot a J frame that doesn’t drive that large, sharp release into my thumb regardless of grip. No issues there with the Ruger. Ergonomically it works much better for me all around.