Cutting Shotgun Barrels

[CharlesHarris]

In modern hammer forged shotgun barrels, the choke is formed within the last 5cm or so at the muzzle, so if you shorten the barrel by cutting off more than that amount, it is safe to presume that all of the original choke is gone, leaving you with a plain cylinder bore.

If you measure the interior constriction behind the muzzle with ball gages of various diameters, you can determine where the choke taper begins, and cut off less of the muzzle to remove some of the choke, but not all of it.