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Old 02-15-2013, 03:34 PM   #1
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Which way

Okay What are your thoughts Which way you can take a pistol say a 10mm 1911 and convert it to .40 with no real problems but can you take a 1911 .40 and convert it to 10mm. is the ejection port that is designed for the .40 going to make contact with the longer 10mm? let me know your thoughts.
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Old 02-15-2013, 06:50 PM   #2
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You can probably convert a 10mm to .40 caliber, but I think that Colt will strongly recommend not converting a .40 to a 10mm.

The 10mm is a much hotter round and most of the 10mm Colt's have modifications not done on other models.
Old 02-16-2013, 02:48 AM   #3
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If you do decide to convert, to a 10mm, the recoil and mainspring poundage will need to be increased (32, 22 is my set up), as of course the barrel change, in the case of the ejection port, could be relieved for unloading a live round, depends on the loaded OAL, but the port is nominal on the colt 1911. I also changed out the FP stop to a EDG flat.

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