Thread
:
Nice Old Double
View Single Post
11-16-2025, 07:51 PM
#
5
Member
Ken Hill
PGCA Member
Member Info
Join Date: Apr 2013
Posts: 818
Thanks: 1,152
Thanked 912 Times in 438 Posts
Art,
The nominal bore size for a 12 gauge is .729. Can you post a picture of the barrel flats showing the proof marks.
Ken