I had a Leman rifle. .54 and feather light. Very narrow butt , 15/16 .54 barrel 35” long. Of beat the crap out of me. It was just a little more narrow then a Hawken but that 1/4 or 3/8 inch made a ton of difference and I had been shooting crescent butts for thirty years at the time.I’ve found no good solution for the beating I take from a narrow crescent buttplate with heavy recoil in certain positions- prone and off the bench. And I’m no newbie and have tried everything everyone suggests. Try shooting a .54 Hawken stoutly loaded prone uphill. I don’t care where you hold it so long as it’s against skin. It’s going to bite like a horse. Because it is impossible to get the crescent seated anywhere.