We have all read and seen the data, research, experiences and discussions on firing 12 ga 2 3/4" shells in short(er) chambers. My question is what about the 3" twenty in 2 3/4" chambers. Any data or research on that? I know it is done as I had a friend in the 60's doing it. I am guessing any potential problems would be magnified due to the twenty's higher working pressure and smaller bore??