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Then I made a pair of these. Kind of tricky to turn, but doable. The OD is almost exactly that of the shotgun bore at
the muzzle, and the ID is almost exactly that of the insert barrels.
The offset is precisely the difference between the two.
The groove is merely clearance for the pinch screw, and the notches simply removing portions of the
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sleeve that were paper thin, and thus prone to damage.
Information contained in
these pages is for reference and entertainment
purposes only. Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how
to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should
be all right.