Excuse me for being so ignorant but regarding those choke dimensions, do they mean that the barrels are that much THICKER at the end where the restrictions are? If so, how far from the end of the barrels are the restrictions? Just curious to learn something I know nothing about...:)

No Ron, the barrel walls at the muzzles will be that much thinner (less consriction) than tighter chokes (more constriction).

Why I asked - I have a Winchester Model 23 Golden Quail 12 Gauge, stamped Quail 1 / Quail 2 AND IC / IM at the factory !

Doesn't make sense.

Will endeavor to have it miked out ...

Thanks all.

Double stamped, it can not be both! 20ga. bore is normally .615 , IC = .007 IM = .020 Most modern guns have about 2-3" of choke, older guns from 1930-s and earlier may have 4-5" of choke from the muzzle. So if the bore is 615 and the shot exits the muzzle at .622 that give you .007 of choke. The only way to get true measure of choke is with a inside bore reader. You must know the inside bore diameter ahead of the choke. That is why a caliper or wedge type tool is misleading. SXS ohio (-:

The choking is the difference in the inside diameter (I.D.) of the nominal bore and the inside diameter at the muzzle. So, the choke constriction is basically how much smaller (diametrically speaking) the muzzle I.D. is than the nominal bore I.D.

So, to have a smaller I.D., the barrel walls at the muzzle are thicker than the barrel walls a few inches down the barrels from the muzzle. (Dean was speaking "comparatively" about a tighter choked barrel, in that Q1, Q2 chokes will result in a thinner barrel wall at the muzzle, as compared to a tighter full choke...)

...just wanted to clarify.

John