What are the barrel markings 65 is 2 1/2 or does it have a 16 in a circle?
My GECO has these markings


If you do not have a chamber gauge use this laugh

This is for 16 gauge
I can give you the diameter for 12 gauge if you still need it.



My chamber gauge reads .728 and the marker .718. It should get you in the ball park.

My 2.5 inch gun measures to between the A & J in MAJOR putting the marker in butt first. And that is 2.62" in actual measurement but remember the marker is a tad small in diameter. You can build up the diameter with masking tape.

Hope this helps

Mike

Last edited by skeettx; 02/13/13 12:00 PM.
USAF RET 1971-95 [Linked Image from jpgbox.com]