Scary finding

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I took my .44 Mag Redhawk and .41 Mag ammo to the range accidentally years ago, meant to bring the .41 Mag Redhawk.

First shot sounded funny and was well short of the 100 yard target.

Dang,, that was all I brought, had to turn around and drive back home. Lesson learned, never bring only one gun with ammo to the range. :)
A .41 Magnum Fired in a .44 Magnum Revolver.JPG
 
What is the chopped down 308 case then? There is one that is essentially an upscaled 300 blk. I can’t remember what it is though.

I have no idea. The 350 Legend brass comes from the same line that ends up as 223 brass.

Upscaled 300 Blackout would be 30.30, or 308, maybe 7.62x39. I don't know of any round for the AR where you cut down 308 brass and reform it.
 
I did that one time and one time only. I have two Star Firestar pistols, a 9mm and a 40S&W. I accidentally picked up a loaded 9mm mag and put it in the 40. I noticed right away with the first shot and the case looked very similar to the OP. Needless to say, if I take both Firestars to the range, one stays in the case while I fire the other.
The wife and I have matching Witness pistols, hers is a 9mm, mine a 40. Yep, I made the mistake of picking up her mag and sticking in my gun. We don't have both out at the same time anymore.

Like the 300 blk, that is a mediocre round to begin with but had(s) a cult like following, that can be catastrophic when chambered and fired in a .223 rifle.
The same reasons I've stayed away from the 300 blk.
 
Friday I got to inspect a .556 AR pistol upper that someone fired a 300 Blackout round in. The bolt carrier was cracked at the front and the bottom of the carrier was almost blown off. The bolt itself was cracked and so was the upper receiver. The BCG was stuck in the upper.
I’ve seen .556 carbine uppers with more damage.

Now when it comes to firing the wrong ammo in handguns, it’s not always an accident. Last year we had a guy using 357 Sig ammo in his M&P 40. He committed three attempt murders before he was caught. When questioned, he stated that he used the 357 Sig ammo so that the bullets could not be traced back to his gun. He didn’t know that we could match the cartridge cases to his gun.
Also, when ever I would a gun chambered in 9x18 to test fire, I would shoot 9x18 and 380 Auto in it and enter both into NIBIN. This was because criminals have found that most pistols chambered in 9x18 will function with 380 auto ammo.
 
I wish I had photos of the 256 win mag cases fired out of a 300 Weatherby, no neck and “fluted”. Never underestimate the destruction of people that don’t know or can’t pay attention.

Knowing people can do things like that make me really cringe when things are developed without some degree of saving them from themselves. Like the 300 blk, that is a mediocre round to begin with but had(s) a cult like following, that can be catastrophic when chambered and fired in a .223 rifle.

I suppose that’s just the Darwin theory at work but when college aged kids need a safe place to draw with crayons so their feelings don’t get hurt, seems kind of reckless. However, back in my day, if I stubbed a toe because I was bare foot riding on gravel, I had to soak my foot in diesel fuel, so the pendulum swings both ways....
This is how you get rid of safe space people without it being murder...
I don't see 308 in 3006, 9mm in 40 etc as very dangerous. I highly recommend not doing it.
The 300 blackout is a safety nightmare. I won't have on because I don't want the hassle of keeping mags separate.
 
This is how you get rid of safe space people without it being murder...
I don't see 308 in 3006, 9mm in 40 etc as very dangerous. I highly recommend not doing it.
The 300 blackout is a safety nightmare. I won't have on because I don't want the hassle of keeping mags separate.

Mag bands or mags of a different color.
 
I had a coworker a couple years back that was describing his new p320 in 40 was having issues. Sporadic cycling issues, couple jams and just over all didn't feel right while shooting. Seems like it needed investigating with those issues!

A week or two later he brought me a bag of brass because he knows I reload. Found exactly what I've seen in some of these pics. I let him know as nice as I could that he put his 9mm ammo into the 40. Embarrassed...
 
GunnyUSMC woww
After reading your post, we have no clue how perps mind works when they are fully set to comite their targets.
I've seen a small share of them, when they were injured in shootout, OD, Juveniles or the local Pen visiting me at the ER after eating blades, screws or paper clips.
But, taking the risk of a kaboom just to avoid a balistic track is unbelvieble.
 
I’ve seen a 338 federal in a 338 RCM. Ammo was brought back because “This ammo doesn’t group at all in my gun.” When asked what he was thinking it was “Well 338 is 338.” Looked exactly like your 9mm cases, bulged right in front of the web. I think I still have that box of cases here somewhere.....
 
czhen wrote:
I've found a scary brass showing what I can see is a detonation of a round 9mm on a .40 cal barrel.



9mm Parabellum is intended to be shot in a chamber sized for 9mm Parabellum cartridges. Firing 9mm Parabellum in a 40 caliber (i.e 10 mm) chamber should be expected to result in distorted (and un-reloadable) brass.
 
"...I've found a scary brass showing what I can see is a detonation of a round 9mm on a .40 cal barrel...."

Six months ago, I would have said you were a lunatic.

I stand behind the Assertion that there are no nuclear weapons targeted at Earth.
earth.

Since then, I have heard (or heard) too many posts from someone shooting a 9mm round in a 40 caliber or 10 mm round chamber.
 
He committed three attempt murders before he was caught. When questioned, he stated that he used the 357 Sig ammo so that the bullets could not be traced back to his gun. He didn’t know that we could match the cartridge cases to his gun.

I suppose that’s better than if he used ammunition designed for the firearm and was successful in the three attempts.

The 300 blackout is a safety nightmare. I won't have on because I don't want the hassle of keeping mags separate.

Mag bands or mags of a different color.

The problem is a different color doesn’t make a round peg not fit a square hole or rather can’t keep someone from putting 30 caliber ammunition in a .223 firearm. I suppose if you hand a green 300 for the green mag and a purple 223 mag for the purple rifles, that would work.

Thus far, I have done it the old fashioned way, just paying attention to what I am doing. If I can’t do that, I likely didn’t load safe ammunition anyway.

Reminds me of the fellow that years ago grabbed a green bottle of Titegroup instead of the red bottle of Varget. I saved the photos and the one of his mangled body part to serve as a reminder to not become complacent and pay attention when dealing not only with firearms but ammunition as well.

CFFBAEF5-4DC9-45C8-97FD-C80602DAE3EE.jpeg

His results were a little more catastrophic than a 9mm fired in a 40.

FC18F5F0-0145-4EEB-A419-6B41C6D69BAA.jpeg
 
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