2 3/4 for the chamber, the bottom narrative on the paper got cut off, yes .170 (chamber)at the start and .076 (muzzle)at the end, 10 inches in length for the right barrel. Those other numbers at the description are from the form on your site. The left minimum thickness at the bottom should be .103@end of the 7 inch forcing cone. Wow we really are deciphering this!
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