8mm IN A 762X 54r?
Guy told me he saw a gun blow up because the shooter chambered a surplus 8mm in a 762x54r. Is this possible?
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Possible? The blow up or the cramming?
I'd say both are possible.0 -
I don't think it would fit, case is 3mm longer and larger in diameter. 0 -
Things that you don't think are possible. Can turn around and bite you.
I never thought it was possible, to chamber and shoot a 8mm Mauser in a 30-06. Until one day I was shooting out in the desert, with a guy who did it.
Lucky for him it was a sporterized 1917 Eddystone. The action held together, but the stock was toast.0 -
quote:Originally posted by Rosie
Guy told me he saw a gun blow up because the shooter chambered a surplus 8mm in a 762x54r. Is this possible?
I think you'd have to want to screw it up pretty badly (IE you'd REALLY have to slam the bolt shut hard to squeeze the longer 8mm into the 7.62x54R chamber, but I think its "possible".
8mm Mauser left, 7.62x54R right:
Someone else can look at the actual cartridge specs, but at a glance the 8mm isn't wider than 7.62x54R. The 8mm cartridge is longer, rimless, and has a shorter overall neck.
Believe it or not CIP (which is the European equivalent of SAAMI) has identical max operating pressures for 7.62x54R and 8mm. Don't think operating pressures are going to be "normal" though, when you're squeezing the neck of the 8mm shut, firing it from a larger than normal chamber (ie promoting case rupture), and trying to cram a .323" bullet down a .312" bore!0 -
Doubtful but possible, unless following the famous last words from Bubba "Hold my beer and watch this"
If the bullet has a chance to move operating pressures render swaging pressure trivial.0 -
Some Mosins were actually rechambered to 8mm. Even so they are NOT recommended to be fired. The conversion took out too much metal for anything but wartime emergency. That certainly could have been the case.
Much like the 30-06 conversions.
That said, if it was an unmodified gun that had a lot of throat erosion (and I mean a LOT) or the chamber had been modified to something such as the Finnish 8X54R sporting cartridge, it's certainly possible. And, in that case, I'd think that the blow up was due not to the pressure of swaging down the bullet (which I think the Mosin would handle) but rather the gas blasting out as the case ruptured.0 -
I have worked at a large outdoor range for around 14 years and I have seen crap happen you would absolutely NOT BELIEVE!!! Lots of the 300 Win Mag through a 300 Weatherby and the like, but I have seen overbore rounds down a smaller pipe more than once too, with varying degrees of resultant destruction and at least a few times no noticeable damage at all. The thing I take away from this is the Firearms/Ammunition producers have a really neat little saying that goes something like, " use this ammo in firearms in good condition chambered and marked ONLY with the exact ammunition listed on this box". Vigilance is the keyword here. People get hurt in this hobby largely by their own lack of the aforementioned.
Having said that, a Smith and Wesson X-Frame in .460, firing Hornady factory ammo at about the 1000 round count came apart at our range last month. No one hurt, which, if I had pictures to share with you, I'm sure would be hard to believe. Split the forcing cone "1 1/4 inches up the barrel and launched 2 quarter sized shards to the three and nine o'clock positions from the barrel attachment area of the frame. Right smack dab in the middle of a 44 lane 100 yard range, about 80% full. Moral of that story? Smith is ?ber proud of the flagship X-Frame, and has done oodles of testing and research before releasing that gun to the market. If it can happen to that new firearm, it should be pretty obvious it could, under the right circumstances happen to any firearm given the right (bad) scenario. NEVER SAY NEVER, and stay frosty on that vigilance thing as it's the only thing YOU can do that will lower your odds of a really, really bad day.0 -
When you say "8mm" we all assume the 7.92X57, but what it it was one of the rimmed 8mm Steyr or Mannlicher rounds instead? 0 -
quote:Originally posted by 62fuelie
When you say "8mm" we all assume the 7.92X57, but what it it was one of the rimmed 8mm Steyr or Mannlicher rounds instead?
Agreed, I could see an 8x50R going into battery, but not the 8x56R nor the 8x57 JS. The latter two the shoulder would keep it from going in. And if you have a hard time sizing these down with a long arm on your press, you probably aren't going to push them in and lock them up with the short little bolt handle. The other thing you would be pushing against is the bullet which is loaded in these necks pretty tightly back into the cases.0
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