10mm Auto through a .41 rem mag chamber

[ttinlv]

I have a friend whom is about to be no longer a friend. He had his S&W 1006 stolen last year and thusly has 1000 rounds of new 10mm Auto ammunition. He is insisting that he will be bringing over to my house the 1000 rounds so that I can run it through my .41 rem mag. And on top of that he's betting a $1000 worth of Vegas Bally's casino chips that it won't harm it. Of course he isn't going to buy himself a .41 rem mag gun to prove his own point.

No way in h3ll will I run anything other than .41 rem mag cartridges through my Performance Center 657 Magnum Hunter.

He is willing to accept you'all's opinion as proof of paying me those chips.

I've already showed him the basic specs between the two, he won't accept that.
Bullet dia. 10.414=.41 rem mag, 10.16=10mm Auto
Overall Length 40.39=.41 rem mag, 32.00=10mm Auto

If I had a .357 revolver, sure I'd run .38 Special as a plinker. As well as if I had a 10mm Auto Revolver, I'd run .40 S&W through it plinking.

Thanks in advance for helping a newbie with basically a freebie vegas weekend.

 

[Husker1911]

Your friend shouldn't play with guns.

 

[ugaarguy]

The basic problem is that .41 Mag is a rimmed cartridge, and it headspaces on the rim. 10mm is a rimless cartridge, and, like most rimless pistol cartridges, headspaces on the case mouth. The 10mm cartridges would simply fall into the .41 Mag chambers and stick at the bottom.

It wouldn't run unless you paid someone to machine the cylinder for moon clips. Even then it still probably wouldn't headspace and fire.

Assuming it would headspace using 10mm/40 S&W moon clips for a S&W 610 (assuming you paid to have the cylinder machined) the 10mm cases would swell to the size of the .41 Mag chambers. Once they swelled they'd either split from swelling into the wider chamber, or stay intact. Either way the swollen cases will stick in the chambers making extraction very hard at best, or only possible by hammering the ejector rod to force the cases out at worst. That's all assuming you'd be crazy enough to machine the cylinder to hold the rimless 10mm cartridges in moon clips and could get them to headspace where the firing pin would still contact the primer. Accuracy would be poor because of the under sized projectiles.

If your .41 Mag chambers are tight and his ammo on the wide side of the specs you could theoretically get a strongly against the odds circumstance where the 10mm cases would wedge into your cylinder just so without modification and headspace correctly to fire. You'd still have stuck cases, and without moon clips your ejector star would have nothing to grab. You'd be hammering the cases out one by one with a dowel rod then.

In other words just don't do it.

 

[ttinlv]

Thanks for the responses.

I won't even let him fire any of my guns. And from the looks of his guns, I won't ever fire any of his.

 

[jdh]

When I get home I may just have to drop a 10 in the chamber of a 41 just to see how far in it would go, just out of curiosity.

 

[Walkalong]

just to see how far in it would go

Like a torpedo in a tube, all the way.

 

[DragonFire]

Due to a mix up in moonclips, I fired 6 rounds of downloaded 10mm through my .45 revolver. All 6 cases split, but all 6 bullets hit accurately on target. The cases eject smoothly.

So if you could get them to headspace them correctly in the .41 chamber, they would fire without damaging the gun. Like others have said, getting to sit right in the chamber would be the biggest problem.

At the range I've seen 9mm and .357 sig rounds fired in .40 guns without damaging the guns (unless you count soot as damage).

 

[Walkalong]

Kind of like doing crack, the first couple of times don't kill you, but you can be sure it will catch up with you.

 

[pinkymingeo]

I've accidentally fired 44mag light range loads (lead bullets) through a 45Colt no problem. They shot pretty good, actually, but the barrel leading was unbelievable. Took a couple of hours to clean.

 

[jeff-10]

I once seen someone accidently fire a magazine of 40S&Ws thru a Ruger P90, which is chambered in 45ACP. Although it jammed three times all the rounds fired and they actualy hit the target. All cases ruptured. Now that left a chill down my spine but a Ruger P90 is built like a tank and both are auto catridges. I could not imagine a 10mm working a 41 Magnum revolver.

 

[Otony]

I accidently loaded 10mm into the .38-40 cylinder of a Buckeye Ruger Blackhawk (these came with both 10mm and .38-40 cylinders). Myself and two friends were spending the day shoointg on BLM land in a hard to get to spot.

I wasn't paying attention when I pulled the gun from the safe that day, didn't realize which cyinder was installed. When the time came to shoot, the first round went off, which was fortuitous as we really, as in "REALLY", needed that gun to fire (a very strange self-defense situation, where I had about a dozen guns laying around, and only the Backhawk loaded).

It fired, the situation quickly de-fused, and our unwanted visitors left. Then I tried a second round, only to hear a resounding nothing as the hammer merely drove the round deeper into the chamber.

I realized exactly what had happened, but the "visitors" were already over the horizon. God was with us that day.

Oh, the brass? It was as you might guess, expended and distorted. I don't think it hurt the Blackhawk whatsoever, but it was nothing to depend on happening twice as became patentedly obvious!

 

[jdh]

Ain't no way a Mod 57 S&W is going to fire a 10mm. The case head is almost 1/2" up inside the charge hole.

 

[Moonclip]

I want one of those Buckeyes as well as the .32-20/.32mag ones. Passed a NIB 10mm one for $400 unfortunately. 10mm ammo wont be making an apperance in my .41mag chambers. Mistakes at the range I have witness with varying degrees of success= .380 in 9x19, .40 and .38super in .45acp. .38super in a .38spl chambered S&W mod 52 autoloader!