I had my machinest friend make me a 12 ga. Chamber length gauge today.
Followed the dimentions from the following web site.
My parker falls right between the 2 1/2” and 2 5/8” lines on the chamber gauge.
My Browning Citori with 3” chambers measures smack on at 3”.
I was told by the seller of the Parker that the chambers were 2 3/4”
So what do I really have here for a true chamber length?
I have been using only 2.5" Mag-Tec brass shells loaded with BP in this
Parker to date.
http://www.tbullock.com/bpsg.html
A simple chamber length gauge may also be made from a bit of heavy sheet metal. This one is double ended; the pictured side is 12 gauge and the other side is for 16 gauge.
12 ga. Chamber Length Gauge.
Cut to 0.798”
2 ½” first ring line.
2 5/8” Second ring line.
3” Third ring line.
(oops need to add a 2 ¾” ring yet, how did I forget that one:-))
