question of barrel length on firearms?

When a firearms manufacturer designates barrel length , does that measurement include the chamber length?
For instance, if a shotgun is said to have a 22" barrel, is that section of steel actually 24 3/4", 25", or 25 1/2"?

Mac2011-11-13T16:08:46Z

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With the exception of revolvers, yes. Revolvers do not include the length of the cylinder. All other firearms include the chamber and are legally measured from the bolt face when closed.

Mr.3572011-11-13T21:09:41Z

The ATF measures barrel length from the bolt face with the gun in battery. That measurement would include chamber which is typically part of the barrel on firearms with a bolt. In many firearms, the bolt locks into the barrel, so the actual barrel length can be less than the overall length of the part called the barrel.

The Real Mike2011-11-13T15:44:06Z

I'm fairly sure its from the bolt face to the end of the barrel, or at least that's the measurement that determines if a rifle is a SBR or not.

Lost Fisherman2011-11-13T15:47:18Z

With the action closed and clocked (delete the 'L' from clocked; silly censors), measure from the boltface to the muzzle. If you have a permanent, fixed muzzle attachment like a flash hider, measure all the way out to the end of the attachment. If the muzzle attachment is removable, measure to the muzzle without the attachment in place.

?2011-11-13T16:02:30Z

i only use bolt action rifles and shotguns, bu 24 inches is generally the best allround lenght.