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I do not believe that would be a wise choice. That said, I am NOT a gunsmith or engineer or firearm builder.
 

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Yeah, the 40 cartridge is a little shorter than 10mm - So, it is fair to call 40 a sawed-off 10!! Just DON'T try shooting 10mm ammo in your 40 though...

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Both the 10 MM and the 40 S&W cartridges headspace on the case mouth and unless the 10 MM extractor holds the 40 S&W case against the breech face of the slide, it will probably fall too far into the chamber for the firing pin to hit the primer. A very foolish experiment so don't even think about trying it!
 

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There are competition guys who buy Glock 10mm's to shoot .40. (disclaimer--I am not advocating doing it nor have I done it, but I have seen it done.). I am not enough of an expert on Glocks to say if there is something different about Glocks that makes it ok? Again, I have never done it, but some do.

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