Velocity?

[Tellico]

I wonder what the velocity was on this round?
I wonder if the rifle stayed together? It must have as no incidents were reported. I found this case head for a .270 in the 100 yd range. Thought it was just a case separation until I looked at the primer! :shock: The brass even flowed into the ejector. Wow scary stuff!

Fred

 

[Cheesewhiz]

Could be a over pressured round, could be a poorly headspaced round. My guess it was shot from the wrong caliber rifle. If it was over pressure, the rim would be chewed up by the extractor. I would have thought the same as you at first glance but reading brass for pressure signs isn't all that reliable.

 

[Jimbo357mag]

I found this at the range. It is a 30 carbine case from an M1 carbine that fired out-of-battery. A regular one next to it for comparison. That could have spit some fire into the shooters face. :shock:

 

[contender]

Scary stuff!

 

[Bucks Owin]

Could be a over pressured round, could be a poorly headspaced round. My guess it was shot from the wrong caliber rifle. If it was over pressure, the rim would be chewed up by the extractor. I would have thought the same as you at first glance but reading brass for pressure signs isn't all that reliable.

"Could be an overpressure round"?!? :shock:

It's a lucky thing that roman candle was fired in a damn strong action, a person is seldom allowed more than one mistake like that one in handloading!!! :roll:

PS: I would certainly check the headspace after that little event! :lol:

 

[5of7]

Too much pressure.

It is possible to have a primer flatten out like that due to too much headspace, but when you see the ejector slot on the head of the case, that is a good sign of excessive pressure. 8)

 

[Cheesewhiz]

Could be a over pressured round, could be a poorly headspaced round. My guess it was shot from the wrong caliber rifle. If it was over pressure, the rim would be chewed up by the extractor. I would have thought the same as you at first glance but reading brass for pressure signs isn't all that reliable.

"Could be an overpressure round"?!? :shock:

It's a lucky thing that roman candle was fired in a damn strong action, a person is seldom allowed more than one mistake like that one in handloading!!! :roll:

PS: I would certainly check the headspace after that little event! :lol:

Tellico should probably post a pic of it from the side, I bet the base is ballooned (read: not flat) and the neck won't look right either.

 

[Tellico]

Could be a over pressured round, could be a poorly headspaced round. My guess it was shot from the wrong caliber rifle. If it was over pressure, the rim would be chewed up by the extractor. I would have thought the same as you at first glance but reading brass for pressure signs isn't all that reliable.

"Could be an overpressure round"?!? :shock:

It's a lucky thing that roman candle was fired in a damn strong action, a person is seldom allowed more than one mistake like that one in handloading!!! :roll:

PS: I would certainly check the headspace after that little event! :lol:

Tellico should probably post a pic of it from the side, I bet the base is ballooned (read: not flat) and the neck won't look right either.

All I found was the case head separated from the case. It is only about 3/8ths" long.
Fred

 

[Jimbo357mag]

Tellico should probably post a pic of it from the side, I bet the base is ballooned (read: not flat) and the neck won't look right either.

All I found was the case head separated from the case. It is only about 3/8ths" long.
Fred

Good grief. Now I get the fact that there was an 'accident' there, not just a problem. I sure hope the fellow was ok.
That is some serious mistake there. :shock:

 

[5of7]

As a rule, head separations are the result of trying to get too many cycles from a bottle necked cartridge case.

Now, if one is careful to adjust his full length sizing die to allow minimum head space (.002" to .003"), or even better uses a neck sizing die, he can get a LOT of cycles from his brass. But if not, he will find that he has to trim his brass more often and when he has trimmed .030" to .040" from the length of the case, he runs the risk of a head separation. This is usually the reason for head separations, although is some cases, it may happen due to extremely high pressures. 8)

 

[wolfee]

Yikes. I read in somebody's reloading manual that "brass begins to flow" when pressures rise above 70,000 psi. It looks like that case did more than just begin to flow.

When I was a kid we were always pressing the envelope at the loading bench. How fast we could get something to go was the only important part. Now, I load like the old guy I am--hot loads are about 1/2 a grain above starting!

 

[Cheesewhiz]

All I found was the case head separated from the case. It is only about 3/8ths" long.
Fred

I missed the "case separation" part in my first glances. Sorry, now it's YIKES.