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Convert 9mm Slide to 40 for 10mm Pistol

silver star

Aluminum
Joined
Sep 19, 2013
Location
OK USA
My searches did not bring much up on this subject but seems like I have seen threads on it.
I am gathering to build a 2011 Government in 10mm.
I am going to ream a 40 S&W Bull barrel for the 10mm.
I have most every thing else except a 40 Slide.
I have a new 9mm STI slide and I am trying to find out what the process is to open up the breach to 10mm specs and what that would involve.
I think I know the breach face is at a 1 degree angle.
I'm hoping indicating the with of the breach equally from 9mm to 10mm would be as simple as using a pillar file. But that seems to easy.
Any thoughts and / or suggestions and / or links would be most welcome.
Thanks for your time,
Michael
 
I've never done that exact conversion. Just for fun, you might want to get a cheap 9mm slide and experiment a bit, develop your technique. The STI stuff has always been pretty nice. I've heard of guys getting RIA slides pretty cheap for conversion purposes. Worth a try? I know a guy with a STI slide in .40 and a Para slide in .40. If I remember I'll measure the width of the breech face cut when I get a chance.
 








 
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