Popoff
Member
Hi Gang,
Parts are dribbling in for my twin 10mm commanders project. I have some questions about my Colt stainless match barrel; to wit, the barrel shaft O.D. is 0.540 until about the last 0.562 toward the muzzle where it gently swells to 0.550. Being new to the 10mm I’m not sure what to make of the range of bushing I.D.’s I’m finding out there. I get it that many, if not most high-performance guns now use a bushingless barrel, but it's still a debate and I fall on the "wear out the bushing, not the barrel" side. Anyway, the bushings I can find on line seem to fall into three main I.D. camps; the 0.580’s, the 0.570’s, and the undersize “old Colt 9mm” -style at 0.489 – 0.500. Bushings don’t seem to be categorized by caliber in the 1911 parts groups but only as “government” or “commander” or “officer”, “defender”, etc. so by length and not so much by I.D. The barrel is overall a tight-ish fit in the Fusion slide that arrived for the evil twin with the aluminum frame. Although there is room for a bushing, it sure ain’t the generous (not to say sloppy) fit you normally see with a .45 barrel and slide without the bushing. So I’m fairly sure the Colt barrel profile is correct for 10mm but what do folks do for a tight bushing in 10mm? I’ve been all over the online vendors (Brownell’s, Midway, Sarco, Numrich, EGW, Fusion, and Dawson Precision) and no hint at all there. The closest I might’ve come is an RIA commander bushing at Hooper’s that also works for the 22TCI barrel (?), and a SIG/Sauer 1911 commander bushing that is a “gunsmith fit” item at Midwest Gunworks. I don’t mind inside/outside turning a bushing, but Kuhnhausen (Vol.-1, Book One, p.44) states a barrel’s total clearance of 0.001 is desirable for a service pistol; I’m not sure even a “gunsmith fit” bushing from say, the 0.570 group won’t be 10-15 times that with this barrel! Many thanks for your comments.
Cheers, and Best Wishes to the Forum for the New Year!
Popoff
Parts are dribbling in for my twin 10mm commanders project. I have some questions about my Colt stainless match barrel; to wit, the barrel shaft O.D. is 0.540 until about the last 0.562 toward the muzzle where it gently swells to 0.550. Being new to the 10mm I’m not sure what to make of the range of bushing I.D.’s I’m finding out there. I get it that many, if not most high-performance guns now use a bushingless barrel, but it's still a debate and I fall on the "wear out the bushing, not the barrel" side. Anyway, the bushings I can find on line seem to fall into three main I.D. camps; the 0.580’s, the 0.570’s, and the undersize “old Colt 9mm” -style at 0.489 – 0.500. Bushings don’t seem to be categorized by caliber in the 1911 parts groups but only as “government” or “commander” or “officer”, “defender”, etc. so by length and not so much by I.D. The barrel is overall a tight-ish fit in the Fusion slide that arrived for the evil twin with the aluminum frame. Although there is room for a bushing, it sure ain’t the generous (not to say sloppy) fit you normally see with a .45 barrel and slide without the bushing. So I’m fairly sure the Colt barrel profile is correct for 10mm but what do folks do for a tight bushing in 10mm? I’ve been all over the online vendors (Brownell’s, Midway, Sarco, Numrich, EGW, Fusion, and Dawson Precision) and no hint at all there. The closest I might’ve come is an RIA commander bushing at Hooper’s that also works for the 22TCI barrel (?), and a SIG/Sauer 1911 commander bushing that is a “gunsmith fit” item at Midwest Gunworks. I don’t mind inside/outside turning a bushing, but Kuhnhausen (Vol.-1, Book One, p.44) states a barrel’s total clearance of 0.001 is desirable for a service pistol; I’m not sure even a “gunsmith fit” bushing from say, the 0.570 group won’t be 10-15 times that with this barrel! Many thanks for your comments.
Cheers, and Best Wishes to the Forum for the New Year!
Popoff