Conversion barrels


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tdstout
November 18, 2012, 10:35 PM
I have seen that there are a few different companies that make conversion barrels that turn your 40 into a 9mm or 357.

Why can't you go from 45 to 40 or smaller? Is it a pressure issue or what?

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hatchetbearer
November 18, 2012, 11:53 PM
breech face size is the main thing, switching from a .40 case rim to a 9mm (.380) is a difference of .02" where it is a .05" difference stepping down from .45 acp. affects the impact zone of the primer, extractor engagement etc.

also most.45 versions of guns are built on a different frame as their smaller counterparts.

hentown
November 19, 2012, 01:08 AM
Mags won't work. Several companies do make 45/10mm conversion barrels, though.

Certaindeaf
November 19, 2012, 01:17 AM
A conversion kit is more common. It depends upon the parent case normally, unless the gun in question is like a TC or something.

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