Couple more dimensions. Twist is 1- 22 1/2 and 16 bore chamber, as per m-4, bottoms at 2 5/8 so I assume 2 1/2 brass or paper case. There's some erosion in front of the 16 bore chamber.


NRA Benefactor 2008
NRA Patron 2007
NRA Endowment 1996
NRA Life 1988