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Old May 11, 2010, 04:26 PM   #3
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Join Date: February 13, 2006
Location: Washington state
Posts: 12,827
Agreed, you will need to have the gun worked on to correct one or both of those issues.

Pre-WW2 45 Colts used a .455" bore diameter, post-WW2 45 Colts use a .451" bore diameter, so factory-loaded 45 Colt ammo often used/uses hollow-based bullets to expand and fill pre-WW2 barrels. FWIW, a new .451" bore barrel or a take-off barrel from a Colt 1917 revolver would screw on perfectly, allowing use of modern 45 Colt ammo with a reasonable expectation of accuracy.
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