What happened here?

KDX

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I was out today and had the barrel pointing to the sky when I closed the bolt on this one and it went off on it's own. The primer fell out when I opened the bolt. It's new brass so I'm guessing a loose primer pocket and it backed out a bit?

IMG_3643.jpg
 
Even if it backed out why was the firing pin able to compress it and cause the discharge.You were very lucky . I would be tearing that bolt apart to see what is happening in there.What does the face of the bolt look like ??
 
There are two issues here, and I don't believe that they are related, the popped primer and the AD. I'll just discuss the ammo.

~~~

High pressure is the cause.
~ Correct cartridge?
~ Check case length.
~ Check cartridge OAL.
~ Check loading data and compare with the loads.
 
Even if it backed out why was the firing pin able to compress it and cause the discharge.You were very lucky . I would be tearing that bolt apart to see what is happening in there.What does the face of the bolt look like ??

All of that ^^^

From the pic, it looks like the firing pin hit the primer, and it wasn't a loose primer getting crushed in there or something like that. The question is, was the firing pin stuck in the forward position when KDX closed the bolt, or did his trigger mechanism let go just as he closed the bolt ?

Since he's not telling us that the bolt handle broke his hand as it came flying back, I'm going to guess it's the latter.

If I were you KDX, I'd be looking for trigger group wear/trigger set up too light, and things of that nature. Did you get the bolt handle completely locked in place, or was it only partially closed ? If it was only partially closed, that would explain the primer coming out, and the horror show looking case. If it was completely locked down, then I haven't got a good explanation for you.

Give us a really detailed description of the chain of events if you can remember exactly what happened/when.
 
There are two issues here, and I don't believe that they are related, the popped primer and the AD. I'll just discuss the ammo.

~~~

High pressure is the cause.
~ Correct cartridge?
~ Check case length.
~ Check cartridge OAL.
~ Check loading data and compare with the loads.

I'm confused. Even if any of these are wrong. How would these cause the firing pin to strike the primer by closing the bolt only??
 
Remind us as to what rifle you are using.
Lodi has it right and I would not be using any more of that ammo until you make sure the rifle is ok and the ammo is what it is what it is suppose to be.
257 Roberts
 
All of that ^^^

From the pic, it looks like the firing pin hit the primer. The question is, was the firing pin stuck in the forward position when KDX closed the bolt, or did his trigger mechanism let go just as he closed the bolt ?

Since he's not telling us that the bolt handle broke his hand as it came flying back, I'm going to guess it's the latter.

If I were you KDX, I'd be looking for trigger group wear/trigger set up too light, and things of that nature.

Agree, that is what I think I see also. I had this happen years ago on an old 870 wingmater that broke the firing pin and it just happened to jam in the fired position. Next shell I pumped into the chamber went boom and scared the crap out of me.
 
What was the temperature where you were shooting ?
Have you de-greased the inside of the bolt... that happened to me about 100 yrs. ago after carrying a Mod. 92 Winchester all day in -30 temps.
 
There are two issues here, and I don't believe that they are related, the popped primer and the AD. I'll just discuss the ammo.

I'm confused. Even if any of these are wrong. How would these cause the firing pin to strike the primer by closing the bolt only??

I think two separate issues happened at one time. Since this is the Reloading forum I only directed my comments to the ammo. If and when the OP starts a thread in the Gunsmithing forum I'll direct my thoughts to the AD issue.

The rifle firing wouldn't cause the high pressure. Firing out-of-battery would have more damage. I think that there is an ammo issue and a rifle issue but that one did not cause the other.
 
KDX,
Went looking for other posts and you mentioned some some of your loads for your 257AI.
Not sure about your listed powder quantities.
That being said I would look at your rifle first.

Looking at your previous loading data, if you are using XBR? powder you are stuffing the 257imp with the same load that you would use is a 25-06!

And you should be looking for damage to your rifle!!!
 
All of that ^^^

From the pic, it looks like the firing pin hit the primer, and it wasn't a loose primer getting crushed in there or something like that. The question is, was the firing pin stuck in the forward position when KDX closed the bolt, or did his trigger mechanism let go just as he closed the bolt ?

Since he's not telling us that the bolt handle broke his hand as it came flying back, I'm going to guess it's the latter.

If I were you KDX, I'd be looking for trigger group wear/trigger set up too light, and things of that nature. Did you get the bolt handle completely locked in place, or was it only partially closed ? If it was only partially closed, that would explain the primer coming out, and the horror show looking case. If it was completely locked down, then I haven't got a good explanation for you.

Give us a really detailed description of the chain of events if you can remember exactly what happened/when.

I slammed the bolt home quite hard and the trigger (Timney) is set about as lite as it can go. I'll do a bump test and get back to you guys. Thanks for all the posts. 46gr of H335 for my fire forming loads with 75gr V-Max bullets.
 
Tried the bump test and it passes. I'm guessing I was the one that touched it off the same time I closed the bolt. The bolt face looks good so I'm not worried about that. I took a fresh primer and put it in the shell and tipped it over and it fell out. One crappy piece of new brass I guess. Once again, thanks for all the replys.
 
I think two separate issues happened at one time. Since this is the Reloading forum I only directed my comments to the ammo. If and when the OP starts a thread in the Gunsmithing forum I'll direct my thoughts to the AD issue.

The rifle firing wouldn't cause the high pressure. Firing out-of-battery would have more damage. I think that there is an ammo issue and a rifle issue but that one did not cause the other.

Too funny someone who never goes out of forum. Kudos to you:p I just don't have that amount of control sorry

Just glad the OP has found the cause but I still think there is a problem in the bolt also
 
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