"I asked for the chamber front end diameter. Our late friend Oscar gave me .798"(12 ga) that has worked for me. Chamber length is measured from the breech end of the barrels to the beginning of the forcing cone." Okay, .798" works for me.
Sorry about the confusion. Yes, I agree that a specific measurement does indicate a degree of choke and most people have accepted that approx. .010 is IC, .020 is Mod., etc.
I was wondering what the commonly accepted chamber diameter is and why there appears to be such variances in the gauges that measure it, leading perhaps to erroneous assumptions of chamber length.
But, perhaps I'm full of it........
