I made my own 50 Hawken in the mid 70's using a set of blueprints that I bought from the Colorado Museum of an original Modina rifle. Of course it had a curved butt plate on it and wanting one as authenic as I could get, I put a curved butt plate on mine. mistake that I will never repeat. If you hold the rifle the way they did way back then, no problems. But I do not hold the butt on the inner ball of the shoulder socket in my other rifles. As a result when I shoot the Hawken in my normal style (I forget and hold it as normal) I get a very bruised shoulder or in the case of one day at a Black Powder Match, I came home with a big old bruise that had a small hole right in the center of it and a bloody undershirt from the blood that was oozing out of the little hole. Took a couple of weeks to heal up too. So I will never again have one of those type butts to kick mine. james