I had a Steven’s single shot 12 gauge with a hard plastic buttplate. It had I think a 32” barrel. Fired three 3” slugs out of it and called it quits it hurt so bad. Never noticed it though when shooting a slug through a deer the following week.

An M1A with steel butt plate throwing milspec 7.62 hurts up against my bony shoulder. I’m not even good for a magazine.

My 300 H&H Browning Medallion is pleasant with Hornady 180 grain factory loads... the rifle weighs almost 9lb scoped