Do you think this guy was loading his '06 a little hot?

[Why not?]

Found this case under one of the benches at the range. There is not even a hint of the primer pocket showing.



Perhaps a serious headspace problem, where the primer backed out, and was then pressed flat when the case expanded,.... or that is +P loading at its finest!

Ted

 

[grizzly416]

proof load thats a spicy load

 

[hometownhero]

That looks a little warm

 

[ultimate_monkey]

Interesting that the primer would go that flat but there is no cratering into the firing pin hole , and from what I can see on my phone. No serious ejector marking

 

[TJCote]

I'd put my money on large headspace issue verses hot loading. No sign of flowing brass ( ejector hole mark) or other issue such as cratered or pierced primer.

 

[burnt_servo]

+p with a headspace problem ? I'd be interested in the before and after measurements of the case head

 

[hickstick_10]

Reading primers is about as precise as divining entrails.

 

[Dogleg]

I'm going with serious headspace problem. I bought a .300 Win once that would do that with factory loads and anything heavier than the lightest hand-loads. Sure enough, it closed on the field gauge. There was no signs of it having set-back lugs or anything else other than being chambered by a "special needs" individual. I cranked the barrel off, cut off 1 thread and re-chambered.

 

[Dogleg]

Reading primers is about as precise as divining entrails.

Perhaps, but when something's guts are hanging out it doesn't take a mystic to divine a problem.

 

[fiddler]

Looks like a factory load.

 

[Andy]

looks like a factory load.

reading primers is about as precise as divining entrails.

x2......

 

[scout_289]

Hard to tell from that angle but do I detect some case stretch - shiny band?

 

[Lefty Dick]

Looks like a factory load to me.
Likely a headspace issue.

 

[billdick]

I have a few that look like that from my 300 imperial. I was experimenting and I had a wee bit to much powder. I cronographed a 180 grain hornady at over 3400 fps.

 

[Eagleye]

I'm putting my money on excess headspace. The case is lacking the other signs of higher than normal pressures that have already been mentioned.

The "spiral" marks on the primer might indicate a semi-automatic rifle as well.

I have seen a number of older Remington semi-autos [740's, 742's] with very generous chambers, length-wise. [Read headspace, lol]

Ted, could you take a picture of the case lengthwise and post it? Thanks.

Regards, Dave.

 

[Spawn-Inc]

Looks like the last boxes of hornady 500mag brass after firing. Using Cci primers I never see anything that flat even when I need a mallet to remove the case.

 

[Mystic Precision]

Headspace.

Jerry

 

[BigUglyMan]

Another vote for headspace. Unless the firing line hole was super tight. The swirlies on the primer look like remnant machining marks left over from the milling of the bolt face. Even so, I don't like it. It needs gun plumbing sooner rather than later.

 

[Ganderite]

Could have been a wet chamber or round. If case or chamber had oil on surface, it would come back hard on the bolt face. pressure could be normal.

But cause needs to be investigated.

 

[oops]

Large pistol primer maybe??......soft cup!!