!2 gauge sleeved to 20 gauge --
Gentlemen and ladies --Sleeving a 12 to a 20 is a severe reduction, but highly possible. I have a D grade that was sleeved from a 16 to a 20 and it looks great. In the process, the barrels are cut off in front of the chamber. The monoblock is then drilled and reamed to the outside diameter of the new 20 gauge chamber. New twenty gauge barrels are made to match the barrel diameter of the 12 gauge mono block. The barrels are then turned down at one end to the diameter and length of the reamed monoblock. From that point,barrels are tapered and contured to the muzzle. The barrels are then permently attached to the monoblock by tig welding, silver soulder or some other method and the 20 gage chambers are formed.
The actual sequence I have presented, might not be exact, but the steps are all required. Don
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