Mark,

I have a set of the "Brownell's Chamber Gauges" from 10ga down to 410ga, and I just miced the 12ga one and it measured, .799 at the forcing cone end, and length of 2.630 for 2 1/2" shells, 2.755 for 2 3/4", and 3.505 for 3".

If anyone would like the measurements on another gauge, email me and I'll measure it for you, and email you back.

binko


I'm now a PORN Star! - Poor - Old - Retired - & Needy