I have posted the original blueprint of the barrel shank previously... just do a search for it... I am not in the office till late this afternoon so I can't link it for you...
Threading is fun, but you will definitely need to practice on some cylindrical stock before trying it on a barrel that you paid good money for... but you will be well pleased with the result once you get the hang of it. You will also have to grind yourself a special bit or two for the 55 degree Whitworth threads, but that is half the fun... I used to just take a 60 degree tool and cut it back 2.5 degrees on each side using my calibrated eyeball and never had a problem...
Good Luck.
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regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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