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No I asked this same question, they never thought to pick them up?do you have any of the cases from before the it blew up?
They said they did, I was not there.Are you sure all rounds fired left the barrel? Did anyone actually see all the impacts?
No it was Remington .223 ammo, you can see it on the case head and thats what was in rest of magazine also. It was the only ammo he had with him.5.56 ammo in a .223 chamber.
Good Idea on lot # I will see if he still has some of this ammo or boxes!With the bolt remaining locked, case in the chamber AFTER the boom,
case measurements should still indicate a good fit to the chamber.
Take an AR, drop the bolt, look at where the gas would go.
This case let loose just in front of the dust cover.
The Upper did not bend out that far.
Not being an expert,
it's a weak case or a excessive charge (is there room in the case to fit much more powder? ) or mud/bullet/case neck in the bore or a pushed bullet or a heat soaked round.
Post the lot number of the ammo. Might help someone else.
Yes I believe it had to been.Was it the gases that caused that mag to blow like that ?
5.56 ammo in a .223 chamber.
My concern with the upper is that possible the chamber was not perfect and it allowed the brass to blow out because it wasnt tight all the way around. Just being extra cautious. It's not my upper. I will ask owner if he wants barrel. Zero markings on this upper??
Considering the ongoing quality struggles at Remington could it be an issue of an overcharged round?
Looking at the pic with case still in the breech, the blown of brass appears to be in same area as the extractor with the bolt in battery. Ill bet it has something to do with the extractor to brass interface
Yes check spent brass for issues if possible to help rule out barrel extension and bolt head space problems.Whenever anything goes wrong it's always good to collect as much of the spent brass as possible.
Yes, most likely the brass "flowed" to fill the recess in the bolt face- to the point where you can see where the brass smeared onto the surface and pushed into the ejector hole. Where the extractor cut lies, it simply blew the spring loaded extractor out of its way and blew out into the barrel extension. Probably over 80,000 psi, as I recall, where case brass liquifies.Looking at the pic with case still in the breech, the blown of brass appears to be in same area as the extractor with the bolt in battery. Ill bet it has something to do with the extractor to brass interface
Exactly.Might just be the pictures but it looks like it blew the web out into the extraction groove all the way around.
I probably would have Fixed it differently.I had a few boxes of 223 Remington ammo that had serious pressure issues in my tikka 223. I was getting split cases and blown primers. I fired 3 rounds and tosses the 5 boxes I had.
That would do it, especially with cases that didn’t have a lot of ‘meat’ at the head.The barrel was over chamfered, as seem in this pic, where the case failure follows the deep chamfer on the barrel. The chamfer should be very slight, not countersunk like that one. There is no support at the sidewall of the case. I would guess the other brass has expended in that area, that case was the weaker of the group, but bound to be an issue. This is an issue with the barrel manufacturer. Red arrow shows the area in question, the seond image with a green arrow shows how it should look.View attachment 7389316View attachment 7389317