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Loud bang from the HMR


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Whilst out lamping with the HMR and few weeks ago I thought I would use an old box of Hornady 17gr I that has been kicking about for a few years -2006 I think, it never grouped so was left in the cabinet.

I got a tremendous bang and a face full of powder and ejected this.

 

post-650-0-61967800-1330272815.jpg

 

The barrel was clear and so I went back to the Remingtons and the gun was fine after a couple of clearing shots, I don't know if it was because of age of just a dud. The rest of the box are going in the river, christ knows what would have happened if it was a centre fire case that let go :oops:

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Never seen that before, with all due respect is the chamber/bolt seriously clean and was the bolt hard closed? I'm trying to figure out how that could split in that fashion, and bad fitting/seating comes to mind.

 

Not good just the same, many other options could cause this as well!

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Never seen that before, with all due respect is the chamber/bolt seriously clean and was the bolt hard closed? I'm trying to figure out how that could split in that fashion, and bad fitting/seating comes to mind.

 

Not good just the same, many other options could cause this as well!

 

The bolt had lots of powder and **** on after but it is usually fairly clean, the anschutz wont fire if the bolt is lifted even a touch.

I have put another 40 odd rounds through since without issue so if it was bad seating I would have thought that I would get more issues.

 

Could it be 'laminated' brass?

 

I don't know what that is :look:

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Years ago at my old rifle club, we had some dated .22 ammo handed to us, each round blew the primer cap off with a loud crack, a flash and an escape of burning powder. Needless to say we pulled the heads and threw 'em. I have no idea of the make or why but must assume a corrosive primer :unsure:

 

Looking again at your picture, it reminds me somewhere in the old memory banks about the production of the .17HMR round. Did they not have problems with the pressures, and wasn't the HMR case originally unable to cope with the pressure? I have an idea the case thickness particularly around the primer had to be increased :unsure:

Edited by hyflier
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The bolt had lots of powder and **** on after but it is usually fairly clean, the anschutz wont fire if the bolt is lifted even a touch.

I have put another 40 odd rounds through since without issue so if it was bad seating I would have thought that I would get more issues.

 

Could it be laminated brass?

 

I don't know what that is :look:

 

'Overlapping layers of brass when it is rolled. Like pastry that has been folded and then rolled; two thin layers. I've seen this in steel plate when it has been gas cut! Sparks everywhere!

Edited by Floating Chamber
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