If, however, the barrel is too small to use one of these and will require one of the smaller ones such as the. 840″ adaptor (12 gauge) is possible, it is quite alright to turn the barrel down to fit the adaptor. It is extremely important that certain precautions be taken both in the selection of’ an adapter of the proper size and also In the preparation of the barrel to fit the adaptor. When silver soldering adapter in position keep barrel just behind adapter cool, preferably with small stream of water to prevent loosening rib. When turning the muzzle to fit the adapter cut most of the rib away with a hacksaw and face end of rib with care. These ribs are soft soldered to the barrel and will easily loosen. CAUTION: Winchester Model 12 barrels with solid rib must be handled with care. This adapter is then ready for brazing or preferably silver soldering which will be mentioned later. The adapter selected, and it is advisable to the largest size that each individual barrel will take, should be fitted so that it can just be forced on by hand down to the end of the turned portion to avoid any chance of its tipping. With the barrel on centers in the lathe turn the muzzle back about 29/32″ with, if possible, a slight taper towards the muzzle. For this reason the adapter which is to be brazed to the barrel is made with different diameters on the inside. 835″ before it is turned although some will run much smaller than this and some Winchester Model 12’s will run as low as. The average Remington Automatic barrel will measure approximately. NOTE: It is well to remember at this point that different makes of shotguns are a different diameter on the outside and often times barrels of the same make will vary considerably. The barrel can be set with the tail center in the muzzle and will be on the chamfer edge mentioned in the previous operation. Set the barrel on centers in a lathe using an arbor which fits the chamber and extends about 2″ beyond the end of the barrel extension to permit the attachment of a lathe dog. Remove burr from the bore at this point with a scraper. A counter-bore with a pilot approximatel y. Face end of barrel smooth and reasonably true with the bore. Cut off barrel with hacksaw 22 1/8″ full, measuring from the base of a shell in the chamber. The published instructions for attaching a Cutts Compensator state:.The Cutts compensator was invented by Colonel Richard Malcolm Cutts, USMC. As it was available before screw in chokes were commonly available this was a signifigant invention.
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It later morphed into a device that also allowed for changeable chokes. The Cutts compensator was originally developed as a device that reduced recoil (35-46% depending on the load used) in large bore long guns.