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Once correctly fitted, the excess threads are turned down,
the edge deburred lightly with a file, and using a small boring bar,
an 11-degree forcing cone is cut into the new barrel.

Also note the generous radius at the base of the threads.
You do not want a sharp corner here.





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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.