Welcome to the new PGCA Forum! As well, since it
is new - please read the following:
This is a new forum - so you must REGISTER to this Forum before posting;
If you are not a PGCA Member, we do not allow posts selling, offering or brokering firearms and/or parts; and You MUST REGISTER your REAL FIRST and LAST NAME as your login name.
To register: Click here..................
If you are registered to the forum and keep getting logged
out: Please
Click Here...
I have a 3 frame 12ga (173xxx) with .740 bores and 3" factory chambers. It was patterned with #1 shot. I have always wondered if large shot sizes required overboring to pattern correctly. Austin chart shows a few .740 guns of later manufacture. Guess we will never know.