Reserve LEO quals 9mm in a .40S&W.

Ignorance is bliss.

What you don't know won't hurt you.

Everyone firing the same (issued?) weapon? If so I'm curious what .40 cal gun shot a whole box of 9mm without fail. (Not that I'd ever try to duplicate - just curious.)

You would think that he or she would have noticed when they were loading the mags.

I wanna know what his score was!

I've seen it happen during firearms training while instructing at a Police Academy - the cadet just didn't pay attention to what ammo he picked up off the table when loading his mags - the incident provided a good training point. His Glock only fired a couple of rounds before having an empty hang the slide open. What kind of pistols were being used at this qualification? I'm amazed that the pistol could go thru 50 rds without a stoppage or without the Reserve realizing what he was doing at some point during mag loading.

Had a security guard on the line firing his brand-spanking new .40 duty-weapon from the store. Heck, they even threw in a free box of ammo. He couldn't figure out why it was keyholing and Mike, the NYPD-officer who got "retired" and turned "gunsmith," couldn't figure out why the cases were ballooning into the unsupported feed ramp area. 9mm in .40 S&W chamber I had to explain to both...

Ooops.

Al

You would think the extractor would have had a problem grabbing the smaller case rim???

I've seen 9mm load in 40 mags and visa versa on a few occasions

You would think the extractor would have had a problem grabbing the smaller case rim???

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The only reason I wouldn't think this would be the case is because from what I've read Lone Wolf makes conversion barrels for the Glocks in .40 S&W. It's just the barrel and they say to use 9mm magazines and that's all you change to shoot 9mm in it. Everyone seems to have great luck with them and say they work great. So the extractor must work well for both. I'm surprised the bullet didn't just fall right through the barrel though. Glad no one ended up getting hurt.

I'm having a hard time with this one...........

I'm sure it happens............... Somebody putting the wrong ammo in a magazine when shooting among different calibers. That part I have no issue with.

I do have a little trouble with buying a report of somebody who shot 50 rounds of 9mm through a .40 without stoppage. The cases are close but close enough to not have a feed or exraction problem.

Let me know which gun I should buy that'll shoot either .40 or 9mm so when prices go up again, I can just switch.

Yet another reason to shoot 45. Even the most ignorant of users won't mess that up.

I'm surprised the gun generated enough pressure to balloon the cases or cycle. I would think that since the bullet isn't engaging the rifle or providing any real resistance, it would just lob out of the barrel under primer-power leaving spilled powder all in the action.

I witnessed a 40SW fired in a 45ACP Glock during a training class. I was standing beside the shooter as he tried to clear a rack of 8" plates. It was actually comical. The gun fired and we watched the bullet go down the 50' range like in slow motion. We never did find the bullet but it dropped about 3' before it got to the target. The case was expanded to chamber dimension without splitting or otherwise being deformed.

Not sure whether to be shocked by the reliability of the pistol used or appalled at what passes for "qualification".

vtbluegrass said:

Yet another reason to shoot 45. Even the most ignorant of users won't mess that up.

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Two thumbs up here!!!

we sold a Kahr Pm9 to a guy, he came in PISSED OFF one day, tossed the gun at us, he said when the womens husband he was cheating with came after him, he racked the slide and it jammed......

We both looked at the gun with a rd stuck sorta.....we popped it out and we looked at each other and smiled....he had loaded 40sw into a 9mm mag...

"Sir, the gun it just fine.....you just loaded the wrong ammo"

vtbluegrass said:

Yet another reason to shoot 45. Even the most ignorant of users won't mess that up.

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I think you underestimate the true potential of ignorance...

DBR said:

I witnessed a 40SW fired in a 45ACP Glock during a training class.

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...see what I mean?

...that person shot all 50 rounds- without incident.

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This does not necessarily mean 'without any functional failures'. The OP could be referring to injuries and/or damage to the pistol. The shooter might have experienced 50 consecutive function issues, but was otherwise unharmed, which of course, would demonstrate yet another level of ignorance.

I too am curious about the qualification score, if any. There is no way 9mm bullets through a .40-caliber bore could possibly hit the target.

I once witnessed someone firing 9mm in a .40 gun at a range. He fired about three shots, the gun malfunctioning at every shot, and I saw one of the cases he managed to eject bulged at the mouth. I was about to say, "Dude! Stop shooting that gun now!" but a safety officer beat me to it.

I would think that since the bullet isn't engaging the rifle or providing any real resistance, it would just lob out of the barrel under primer-power

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It'll happen. Fast pistol powders hit peak very quickly. Some do it before the bullet has even cleared the case mouth. Once peak pressure/force has occurred...it's all momentum, and because the bullet isn't dragging on the barrel...there's no resistance on the slide.

There is no way 9mm bullets through a .40-caliber bore could possibly hit the target.

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Oh, yes there is. I'll tell an embarassing story on myself here. Please be kind.

On a Single-Action outing not so long ago, I was armed with a Ruger Blackhawk .41 Magnum and a .45 New Vaquero. The .41 ammo was loaded down. In fact, I had the same powder and charge in both calibers. 8.5 grains of Unique.

I...*ahem* inadvertently/dumbassedly loaded the .41 ammo into the Vaquero.

The report and recoil were normal. The bullets were mowing down the steel plates at 25 yards...pretty much par for my shooting...and the plates were thumped with authority...and there wasn't a clue as to what happened until I ejected the cases.

I've since adopted the practice of placing the ammunition with the guns on opposite ends of the bench.

He said the deputy that was policing the brass brought him a few weird looking 9mm casings. they are all ballooned out. He said someone firing a .40 accidentally got issued a box of 9mm. and that person shot all 50 rounds- without incident. Who ever it was---was very lucky.


I have seen this more than once. The 9mm fits in the 40 mag and the extractor holds the brass enough to set off the primer. However, every time I've seen it the gun jammed. I might not be that dangerous as the brass expands fast being unsupported and a lot of the pressure escapes around the bullet. Not that I'm recommending it!

Now Lone Wolf makes 9mm barrels for the .40 S&W and .357 Sig Glocks. The extractor works pretty well as the 9mm case, being slighty cone shape, has a base diameter close to the .40/.357 Sig.

So....

I have no doubt a Glock .40 will fire 9mm with the regular barrel. And note the Glock 17/22/33 use the same recoil springs! Now the accuracy would be awful as you have a 9mm slug going through a 10mm hole.

So yea, I'd want to know that guys score. And for that matter, just how bad do you have to shoot that qual to fail?

Deaf

Back when we used to carry the 4506 (.45 ACP), we would occasionally have some desk jockey grab 9mm ammo, since it was also set out to accomodate detectives and brass who carried substitute-standard weapons. 9mm will load just fine in a 4506 magazine. However, when you drop the slide, the entire round will be ejected through the barrel.

In a word, it is hilarious. *CLACK* *BLOOP* "What the heck?"

Mike