SES,
Please cut Bob some slack as he has an upside down perspective in the big booming curved butt plate.
For the record, I still have the chronograph range logs from my first range session with my then new 9.5 pound 1886 45-90 TD with 26 inch octagon barrel. From a bench rest, I fired Cowboy Action rounds (slow and easy) up through good 300 , 325, and 400 grain hunting ammo at 100 yards.
Early on, I determined that mounting the rifle as if it had a shotgun butt with recoil pad was WRONG!
A bit of experimentation showed me that (for me) the secret was to tuck the lower point of the butt plate into my arm pit and all was well. Since then, never a bruise, cut, or uncomfortable shot.
Even with hot DG rounds (450 grain Kodiak FMJ bullet at 2150 fps) the recoil just raises the barrel a bit and then eases it back down on target (which has usually hit the ground by then) .
Maybe this little secret will help Bob handle the curved metal butt plates.