Model 70 explosion

Factory ammo can have flaws, I had some PMC 44 mag rounds that were obscenely hot and found a 30-06 round in a box of 7mm Mauser federal.
 
I have seen similar reaction with a 303 British in a 7RM.

I have to bring up the superior design of the Model 700 again.. because I have seen a .303 British factory round fired in a factory 7mm Rem Mag 700 with no resultant damage to the rifle. The case did not rupture, it was fully sealed within the 3 rings of steel and had fire formed to look like a belted magnum case at the rear. The barrel had to be loosened to remove the bolt however.
 
Meh. Giant guessing game, without being able to get hands directly on the parts involved.

Pretty frikken ugly. Feel bad for the dude.

Certainly explains why nobody takes ammo back if you bought the wrong stuff.

Now, a bit tin foil, but what are the possibilities of tampered ammo after it left the factory?

Lots of screwed up folks out there that really hate on the gun culture types.

You'd sorta figure that the folks from Federal, would be all over that box of cartridges, to see what was what, or at least, someone would be. The liability burden on them for a potential factory ammo screwup would be the kind of thing that would give their Lawyers the shakes.
 
Maybe the ammo sat too close to a heat source and the nitroglycerin cooked out and settled in the case?

To me, this seems like a powder failure. That's not a 'catastrophic failure', that's an explosion.
 
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Picture 3 shows the gas port hole still there so that's what has me thinking it failed (cracked) on the right and wrapped around to the left.
Almost looks like the receiver ring is all still there although flattened.
Lots of brass flowed into the extractor cut area (right side) of barrel.

the receiver is pointed at us in the picture, so the big peel out is on the LEFT side of the rifle yes?

looking at #2 the case is stuck to the right side of the chamber, but the left side is gone...

so it looks like it blew out the left side to me?
 
Here’s what a double charge of blue dot does to a weatherby

https://thefiringline.com/forums/showthread.php?t=341348

photobucket photos should not be allowed... their printing screws up what you want to see...

The stupidity of reduced loads in large cases...without checking all the charges before bullet seating... just a stick inserted into the case would have indicated a 'double charge' ...lucky the shooter came out okay.
 
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Are we really sure that the first round was trouble free. Maybe it went bang but only moved the bullet an inch or so then when the second was chambered and fired the rifle was destroyed. How much experience did the shooter have in knowing something may not have been right after the first shot. Just speculating.
 
Just another theory. What other cartridges with a bullet of say 30 cal or larger would chamber in a 7 MM Mag so they would fire but have an over bore diameter slug to jam at the throat of the chamber? And does the shooter own any such cartridges that might have become mixed into his box of factory Fed'ls?
 
Might it be possible there was no partition in the partition bullet or the partition was compromised & the first shot sent the core out leaving the jacket from the first round stuck in the bore as an obstruction? Partition jackets are open at both ends.
That's too bad the shooter lost an eye, that would be horrible.
 
Picture 3 shows the gas port hole still there so that's what has me thinking it failed (cracked) on the right and wrapped around to the left.

The gas port hole is on the right side of a model 70... there shouldn't be any holes on the left side.

The barrel almost looks like it could be reused, which I wouldn't expect with either an obstruction or a charge of fast burning powder.

The stress crack theory may be correct, like jumbo jets that fly along just fine until a crack gives way and an engine falls off or a piece of fuselage blows out.
 
Just another theory. What other cartridges with a bullet of say 30 cal or larger would chamber in a 7 MM Mag so they would fire but have an over bore diameter slug to jam at the throat of the chamber? And does the shooter own any such cartridges that might have become mixed into his box of factory Fed'ls?

I was trying to wrap my head around if that could have been the case, and figured it was pretty poor odds of not being noticed by the average guy loading ammo.

Given that most of us have been playing "One of these things, is not like the others" since Sesame Street was a dirt road and only available in Black and White, it seems to me that a fella would have to be some bull headed to force a bolt closed over a 30 or larger caliber bullet seated in a same case, and the injured guy is supposedly at least a somewhat experienced shooter (Ex Marine, IIRC).

Dunno. The idea of shucking the core out of the Partition and leaving the jacket in the bore seems as possible as any theory I have seen here.

Unless someone does a forensic dig through that rifle and publishes results, I figure guessing is as close as we'll get to knowing.
 
The gas port hole is on the right side of a model 70... there shouldn't be any holes on the left side.

The barrel almost looks like it could be reused, which I wouldn't expect with either an obstruction or a charge of fast burning powder.

The stress crack theory may be correct, like jumbo jets that fly along just fine until a crack gives way and an engine falls off .

Yes gas port is right side only on the M70 regardless of it being a Pre 64 or a newer CRF version.
There should be no holes in the left side.
Difficult to say for sure but the bolt handle looks like a Pre 64 so what we have there is a re-barreled custom stocked rifle with who knows what history.
Receiver ring held together until one day it didn’t.
I tend not to blame the ammo or the barrel being obstructed.
 
Some helpful soul put factory ammo back in a different box at some time in the past. He loads up and shoots one that is larger than the barrel diameter.
 
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