Probably regular brass fired in an old H&K with a chamber with those kind of groves supposedly to help with extraction.
Picked up some really strange looking 308 brass at the range the other day. Any idea what in Sam Hill this is?
Last edited by J.Baker; 10-06-2015 at 07:37 PM. Reason: fixed link to display photo
Probably regular brass fired in an old H&K with a chamber with those kind of groves supposedly to help with extraction.
Pretty sure the FAL's also ran some scalloped chambers...
But yes, +1 to the above
I'm a firm believer in the theory that if it bleeds, I can kill it.
There aren't many designs with fluted chambers, but the CETME and HK ones outnumber the rest 100 to 1 or better. Probably somebody with a PTR-91, Century Arms parts gun, or an HK-91.
No, they did not.
The inferior engineering of the roller delay system results in unacceptable bolt velocity, requiring a fluted chamber to prevent case separation. FALs are just gas guns.
Yep
The Dunning-Kruger effect is alive and well.
Thanks, mystery solved. For anyone interested, here is a link. Even talks about the fluted chamber.
http://notpurfect.com/main/hk91.htm
I have a HK91 and had read once ,that the fluted chamber is to provide a positive extraction by lubing the case with hot gas. mine extracts and tosses the case about twenty feet ahead and to the right, you can walk over and pick it up but it will probably be to hot to hold.
Thanks for the correction
I'm a firm believer in the theory that if it bleeds, I can kill it.
But is it re loadable
If it is boxed primed, yes. But it is oversized and worked a lot so the life of the case is lessened.
The only calibers I've seen with flute marks are 9mm (MP5), 10mm (downloaded for MP10), 223 (HK33), 308 (HK91), 7.62x39 (PTR), and 7.62x54R (SVT40).
The Russian calibers don't matter because they're usually steel. But the 308 and 10mm cases are heartbreaking.
I had some old IVI brass that I had loaded, probably five times or more but mild, and they got uglier and uglier with each reloading.
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