I was always respectful of shotgun shell data, following it to the letter. If you change one component you could change pressure by as much as several thousand psi. Substituting paper wads for plastic is going to change the pressure and I don't know which way. I remember with brass hulls and paper wads it takes much more powder than you would use with a plastic hull and wad. I cant fit the content of a 2 3/4" shell into one 2"s. I wish I was home to look at my notes.
Harry
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