10mm Glock barrel/caliber change ?

M

Metal god

New member
Looking to buy a 10mm Glock 20 in the SF version .

I'd also like to get a 40 S&W barrel for it as well as 357sig

Can those two cartridges be fired reliably using the 10mm firearm and it's factory magazine ?
 
I fire 40 S&W through the 10mm barrel. It feeds just fine in the 10mm magazine. If I planned on shooting a LOT of 40 ammo then it would probably be advisable to get the 40 barrel. I would assume the 357 Sig would work just as well, but no personal experience.
 
I've seen people report 10k rds of 40 in their 10mm barrel. I havent done that myself as I have a 40 pistol already.
 
I shoot .40 from my 10mm glocks, S&W’s, etc. You would need a conversion barrel for 357sig. 10mm mags will feed .40 and 357sig reliably.
 
How are you guys shooting 40 out of the 10 ? Don’t they both headspace off the mouth and the 10mm case is longer ???
 
I shoot .40 from my g-20 long slide. Literally feels like a weak 9mm. From my all steel Smitty 1006 it feels like a mouse fart.
 
I started out shooting .40 ammo in my 10mm barrel, worked great. Liked the .40 so much in the 10mm guns that I bought KKM .40 conversion barrels for the G-20 and a G-29. No problems.

For a while I ran .40 handloads (less than max) in my G-20 with a 20 pound recoil spring on a steel rod, ran great, shot great, soft recoil.
 
BTW, the KKM barrels were conventional land and groove rifling and were more accurate with plated bullets than the stock 10mm barrels.
 
Looking to buy a 10mm Glock 20 in the SF version .
I'd also like to get a 40 S&W barrel for it as well as 357sig

Can those two cartridges be fired reliably using the 10mm firearm and it's factory magazine?
Click to expand...

Yes.

Been there, done that very that ... G20 and a G29. Aftermarket barrels, but same factory 10mm magazines and same factory 10mm recoil assembly.

In theory, it would/should also work in the longslide G40 MOS, if some aftermarket vendor actually made 6.2" tubes chambered in these other 10mm-derivative cartridges.

The easy barrel-swapping capability of the Glock 10mms - with nothing else needed - gives you a 4-caliber autoloader: 10mm, .40S&W, .357Sig, and 9x25 Dillon.

Just pick your favorite 10mm Glock and be done with it. :cool:
 
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