Shooting .40 s&w out of a 10mm

[JoeBobJoe]

Watching a Mr. G&G 10mm s&w review yesterday, mr.g&g said it's fine to shoot .40 s&w out of a 10mm.
What's the consensus on this. If possible/positive can a .380 out of 9mm be just as ok?
I think it could work but is it with out adverse side effects?

[Disciple]

Don't these cartridges headspace from the front of the case? What keeps the .40 from chambering too deep; the extractor?

[JoeBobJoe]

Don't these cartridges headspace from the front of the case? What keeps the .40 from chambering too deep; the extractor?

Yep, just the extractor. I guess it's enough to get a primer strike, but is it safe? Right.

[gunnerblue]

Don't these cartridges headspace from the front of the case? What keeps the .40 from chambering too deep; the extractor?

Yes.

I have heard it said and seen it done without incident that Glock extractors are strong enough to keep a .40 cartridge from entering too deeply into a 10mm chamber. Honestly, though, with .40 barrels being available for 10mm handguns (Glock at least), I question why anyone wouldn't just buy one and eliminate the risk.

[ViniVidivici]

There's no good reason to do any of that.

[markm]

And NO. You can't shoot .380 in 9mm. It's not like .38 spl/.357 mag where the dies are the same.

[JoeBobJoe]

And NO. You can't shoot .380 in 9mm. It's not like .38 spl/.357 mag where the dies are the same.

Is Mr Guns & Gear right about the .40 in a 10 mm? Or just the me on the .380 in 9mm.
I am asking because I figured .40 is shorter than 10 mm in length, it can't headspace correct if too short.

There's no good reason to do any of that.

Yeah, that's what I thought. But he is saying the manual says no but it's totally fine.
I was surprised Mr. Guns & gear was saying that on a S&W sponsored video.
I figured It something people started doing, IDK. Thanks

Yes.

I have heard it said and seen it done without incident that Glock extractors are strong enough to keep a .40 cartridge from entering too deeply into a 10mm chamber. Honestly, though, with .40 barrels being available for 10mm handguns (Glock at least), I question why anyone wouldn't just buy one and eliminate the risk.

.

Right a Glock barrel or S&W m&p are $150 little more little less depending on brand.

[chamber143]

And NO. You can't shoot .380 in 9mm. It's not like .38 spl/.357 mag where the dies are the same.

i accidentally shot a9mm projectile out of a380 case from a9mm pistol and it shot fine. Note the case got jammed in the gun and it was pain in the ass getting it out but it fired

[1168]

Its not a stellar idea, but .380 will fire from a G19, 228, or M9, from the mag, but it will not cycle on its own. I don’t know if the same is true of .40 in a 10mm chamber.

[chamber143]

Its not a stellar idea, but .380 will fire from a G19, 228, or M9, from the mag, but it will not cycle on its own. I don’t know if the same is true of .40 in a 10mm chamber.

Oh I didn’t do it on purpose. I didn’t know what happened until I got the brass out and knew immediately.