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Anyone here had a 1911 chambered in .40 converted to accept 10mm? Barrel switch and fitting? Any thoughts or suggestions?

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Easiest is to just have your .40 barrel reamed to 10mm. My gunsmith charged me $35 as I recall to do this on my Para 16-40. The trick is finding a smith with a 10mm reamer. (Mine had one, but it was chipped and he didn't want to risk my barrel. I ended up buying a finish reamer, which I still have.)

 

Switching the barrel is similarly easy. Cost of barrel + fitting.

 

I also recommend the following changes, although they are not required: EGW Flat Bottom Firing Pin Stop, Wolff 25# hammer spring and Wolff 24# recoil spring. You can order all these parts from Brownells for about $40. These will help keep the unlock/timing of the action closer to how it runs in 45 ACP.

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How about the other way? I had a 40S&W barrel fit to a 10mm pistol. I imagine it is not too different :)

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Yes. 10mm to 40 S&W is a barrel switch. No way to "un-ream".

 

Although....

 

I would rather invest the money in a reloading set-up. Then I could download to 40 S&W levels, and be cheaper than I can buy ammo for either caliber.

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Yes. 10mm to 40 S&W is a barrel switch. No way to "un-ream".

 

Although....

 

I would rather invest the money in a reloading set-up. Then I could download to 40 S&W levels, and be cheaper than I can buy ammo for either caliber.

 

Fair enough, reaming is probably less expensive.

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