Well, this is a first for me. I recently bought a bunch of once fired 7.62 x 51 military brass, which I do alot, but noticed something strange on a bunch of them. The necks were very strongly sererated, lines running paralell to the brass body. I didn't really think anything about it till I tried to resize them. There was and is no way in hell that they will resize as they jam solid very shortly as I begin to resize. I tried several different lubes and a different die but got the same results. Machine gun brass ??? Has anybody heard of such a thing ? Is there anything I can do with them or just send them to recycle ?I don't have the right to post a pic or else I would.
Sererated necks on military brass
- Thread starter HIGHRPM
- Start date
Heckler & Koch semi-auto rifles are the ones that put those lines on the brass.
They will eventually disappear, for the most part, but are very hard to resize the first time.
I am not fond of brass that has been thusly mutilated.
Eagleye.
They will eventually disappear, for the most part, but are very hard to resize the first time.
I am not fond of brass that has been thusly mutilated.
Eagleye.
Measure the length of the fired case and if it is aprox 1/4" longer than spec then more than likely you have fired blank casings. If that is the case you might be able to trim them to close to spec length and then size and then trim to proper length.
I measured the sererated cases and they are the same length as the others, so that is not the issue. I tried for quite awhile to resize onle case and got about less tha 1/8 " of the neck done. The lines on the necks are so raised there is no chance for me to resize them. I think I am going to throw them into the metal recycle and cut my losses.
I read somewhere,can't find the article now,that some rifles and light machine guns such as HK's had "fluted" chambers to help with the extraction process???Wish I could find that darn article,can't for the love of me remember who wrote it.
like this:
That's just downright nasty looking!!
like this:
That's ridici-donk!
You would be correct,the fluted chamber is not only found on some semi's an MG's but handguns as well that use a delayed or blowback system to eject the spent cartridge.
Fluted chambers are generally but not always found on high pressure cartridges,the flutes release pressure so the cartridge case does not stay fully expand out to the chamber walls or else the extraction process under those conditions would tare the case apart.
