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Anyone using 40 in a 10? I know there was an article by a guy using that in a Glock, IIRC, the OEM 10 barrel.

Like to hear folks experience. Thanks.

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I started a thread here shooting 40 S&W in my 10mm XDM-ELITE.

Worked great as long as you didn't drop one in the chamber and let the slide slam shut. You had to let the slide chamber a round from the magazine inorder fir the extractor to slip over the case rim and control head space.



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Mathew 22: 37-39



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No gun maker will recommend it but lots of people do it with no issues. My sister and brother in law were shooting my Glock 20 the other day. 10 mm ejects a lot farther is the biggest difference. The new M&P shoots 40 better than 10mm. Two failure to feeds for some reason with 10. Nicer gun but not inspiring a lot of confidence so far. Never a problem at all with the Glock. Trigger sucks, sights suck and it's clunky.

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Great thread above, thanks! Appreciate the replies folks!

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I do in a Delta. Just make certain they are packed tight.....


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Originally Posted by 65BR
Anyone using 40 in a 10? I know there was an article by a guy using that in a Glock, IIRC, the OEM 10 barrel.

Like to hear folks experience. Thanks.
Been discussed a lot here.

Yeah, I tried it in my Glock 20, and it worked fine. Some say it over stresses the extractor hook, but a lot of people have put a lot of rounds down range this way with no problem, too.

Personally, what I ended up doing was buying an aftermarket .40 S&W conversion barrel for my Glock 20 (about $100.00), which works perfectly, and won't over stress the extractor, assuming that's a legitimate concern.

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Originally Posted by The_Real_Hawkeye
Originally Posted by 65BR
Anyone using 40 in a 10? I know there was an article by a guy using that in a Glock, IIRC, the OEM 10 barrel.

Like to hear folks experience. Thanks.
Been discussed a lot here.

Yeah, I tried it in my Glock 20, and it worked fine. Some say it over stresses the extractor hook, but a lot of people have put a lot of rounds down range this way with no problem, too.

Personally, what I ended up doing was buying an aftermarket .40 S&W conversion barrel for my Glock 20 (about $100.00), which works perfectly, and won't over stress the extractor, assuming that's a legitimate concern.


There is no way to over stress the extractor shooting 40 S&W in a 10mm



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Originally Posted by mauserfan
I do in a Delta. Just make certain they are packed tight.....



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Originally Posted by jwp475
There is no way to over stress the extractor shooting 40 S&W in a 10mm
The theory I've heard proposed is that when you shoot .40 S&W in a 10mm barrel, you are relying 100% on the extractor hook to headspace, and when the firing pin strikes the primer, that's stress on the hook that isn't present when a round is headspacing in the forwardmost part of the chamber on the mouth of the cartridge.

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It will never work...will bring about the end of the world as we know it.

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LOL - GG.

Well I have always been a 10 fan, but alot of 'practice' FMJ ammo I understand is loaded to 40 levels, but priced at a premium over the 40.........more $$$$ for same same performance, again with a lot of the factory FMJ out there in 10.

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i do it in g20 and g40 , the target doesn't care which gun it came from.

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Originally Posted by The_Real_Hawkeye
Originally Posted by jwp475
There is no way to over stress the extractor shooting 40 S&W in a 10mm
The theory I've heard proposed is that when you shoot .40 S&W in a 10mm barrel, you are relying 100% on the extractor hook to headspace, and when the firing pin strikes the primer, that's stress on the hook that isn't present when a round is headspacing in the forwardmost part of the chamber on the mouth of the cartridge.

That is ridiculous theory and you will never notice the difference



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The Glock and the XDM-ELITE have very robust extractors and the shootings of the shorter 40 S&W in a 10mm isn't an issue.

I fo agree that a pistol with a much less robust extractor could be an issue



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Put quite a few 40's in my new M&P 10 past few days getting the sights right. Picked up a stack cheap from guys backing away these days. Would have cost more to shoot that many 10's and been a bit of a work out too. At close range, 10 yards or less, they hit the same so it's effective feed back. Farther back I don't remember exactly with the Glock. A 12" gong is a hit either way though. Common sense and basic logic get people hurt all the time, but this practice seems harmless enough anecdotally at least. So many idiots on You Tube telling us to try it at home. How rare is that?

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My understanding is it's not a great idea in 1911s.
Glock, SW, have stubby little firing pins.
Any loose round isn't likely to be hit hard enough to fire.

A 1911s pin will project enough to light a 40 that is in the front of the chamber
and not against the slide. That's a crap ton of headspace, a lot of room to get a running start before it hits the slide.

Don't even own a 40, or 10.
Just readed it.


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I’ve put a lot of 40s/w rounds down range through my G20 factory barrel as well as a Lone Wolf barrel. Never had a single issue. I’ll continue to use 40 for target practice since I have a lot of it.


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Originally Posted by AcesNeights
I’ve put a lot of 40s/w rounds down range through my G20 factory barrel as well as a Lone Wolf barrel. Never had a single issue. I’ll continue to use 40 for target practice since I have a lot of it.


You won't have a problem with the Glock extractor



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Originally Posted by AcesNeights
I’ve put a lot of 40s/w rounds down range through my G20 factory barrel as well as a Lone Wolf barrel. Never had a single issue. I’ll continue to use 40 for target practice since I have a lot of it.
If you have a Lone Wolf .40 S&W conversion barrel for it, might as well use it. Even if the stress on the extractor hook is only slight, might as well save it even that much stress.

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