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Scrap metal or useable?

814 views 8 replies 8 participants last post by  Show Low 
#1 ·
Going through my brass I notice a few things and not knowing better I would like to ask for experienced opinions. My Stag Arms AR-15 has a pretty strong ejector and leaves marks on the brass heads where it grabs the casing. I attached a photo of a few cases showing how the ejector marks the heads, would these be deemed useable or would you scrap them?
 

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#4 ·
The only problem I could guess at is if the extractor happened to find the exact same place and a second exaction would tear off the case head and mebbe leave the remainder of the case in the gun. I'd prolly shoot them at least once more.

Just a thought; The pics kinda look like the bolt has started moving rearward before the case pressure has dropped enough to allow extraction. Not an AR expert, just a thought...
 
#6 ·
I'd use 'em.
 
#8 ·
Show Low:

You can reuse them but the problem is not the extractor but the timing of your AR. It is attempting to remove the case before the gas pressure has subsided enough. Too much gas is getting to the action. You might look into an adjustable gas block if the gun is direct impingement. Here is an article on one and how it works:

http://www.alloutdoor.com/2013/12/17/adjustable-ar-gas-blocks/

The suggestion to increase buffer spring might also work but I think the adjustable gas block a better solution and you can adjust it for your favorite load and when you find a new favorite load re-adjust it for that load. I generally don't like add-ons like this but you gun has a timing problem. Tearing up brass can eventually get expensive. I have one gun that does this in spades, my Hakim. It attempts to rip the rim off the empties and throws them into the next county. I will not shoot good brass in it and only use surplus 8mm ammo that is not reloadable anyway. I hate corrosive primers which this ammo has but I think this is the best solution for this little used gun.

LDBennett
 
#9 ·
I didn't mention it but my rifle has a gas piston rather than a direct impingement gas system. I called the tech folks at Stag Arms and their lead guy called back a few moments ago and and his thinking is that I may have a tolerance situation in the chamber where the brass is being expanded too much during ignition and the ejector is doing it's job but is having to pull too hard on the casing to get it out. He suggested placing a chamber brush with an oiled patch in a drill motor and polish the chamber and see if that will break away any fouling that may be contributing to the problem, if it doesn't work, he said they would replace the entire barrel for me. We'll see how it works out.
 
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