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Converting a 1911 in 40 cal to 10 mm

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3 comments

  • perry shooter
    Hello Long-Haul BE careful BE very very CAREFUL. IMHO the 10MM is at or beyond the design limit for a 1911 type pistol . That is one of the major reasons Colt dropped the DELTA the first time. Again IMHO if you want a BIG THUMPER in a semi auto go with one that is designed for 44MAG or 50 AE etc. YMMV
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  • tsr1965
    As perry shooter suggests, the 10MM Auto, is much more than a 40 S&W that has been lengthened. Contrary to popular trends with the 32 S&W long & 32 H&R magnum, 38 special and 357 magnum, and 44 special and 44 magnum, the 40 is a shortend, reduced pressure version of the 10MM.

    Most if not all 10MM, 1911 style auto's use a supported chamber, to help handle the pressures. That is something that is inherent in the frame. Basically most 40's have unsupported chambers...unless they were built as a switch barrel 10MM to start with.

    Best
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  • beantownshootah
    Well, converting 1911s to 10mm is possible, but not trivial.

    To get this to work safely, you'd need many custom parts and a good amount of gunsmithing to fit them safely and get the gun to work reliably. This isn't just a "drop in" project, nor is it really something to be attempted by amateurs.

    By the time you're done, you'll probably have spent more on parts and labor on the project than you would have if you had just bought a 10mm gun to start with, and you'll end up with something with no resale value and no warrantee. If you ever have a problem with it, you're screwed.

    In short, not worth it.
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