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My AR dents my brass......

Discussion in 'Rifle Discussion' started by Mikej, Mar 3, 2016.

  1. Mikej

    Mikej Portland Gold Supporter Gold Supporter 2015 Volunteer 2016 Volunteer

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    Yep, what to do about this, if anything? The dent is small and just below the shoulder. My concern is that it will affect the reloading of said brass.

    P1040127.JPG

    I get a dent in my .45 brass from my full size Kimber buy after sizing/decapping you can hardly see it and it doesn't seem to affect the reloads.

    I was impressed with this AR from Curt's because it throws the brass slightly back and in a real small area. Small especially compared to my hand guns. Thinking of putting a piece of mole skin on the little deflector nub on the upper.
     
  2. Cameron72

    Cameron72 Harrington, WA Bronze Supporter Bronze Supporter

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    A piece of adhesive backed Velcro (the soft fuzzy side) on the brass deflector can help.
     
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  3. erudne

    erudne The Pie Matrix PPL Say Sleeping W/Your Rifle Is A bad Thing? Bronze Supporter

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    The only cure is to buy a second AR:rolleyes:
     
  4. Caveman Jim

    Caveman Jim West of Oly Springer Slayer 2016 Volunteer

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  5. ZA_Survivalist

    ZA_Survivalist Oregon AK's all day.

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    My M85 bolt rams the heck out if my brass, as well as the dust cover kisses it gives each case.

    image.jpg
     
  6. ZA_Survivalist

    ZA_Survivalist Oregon AK's all day.

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    +1 to this, pretty much any soft material you can adhere to that deflector.
     
  7. Mikej

    Mikej Portland Gold Supporter Gold Supporter 2015 Volunteer 2016 Volunteer

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    Perhaps the little fuzz ball off my beanie hat.....But the other ARs/guys might laugh at me?
     
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  8. OutlawHoss

    OutlawHoss Klamath-Siskyou Well-Known Member

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    I get minor (<10% of rounds fired) deflector marks in my DPMS LR308. The pad on the deflector sounds like a good idea. If you're really needing to make sure the brass has a decent life-span, you could anneal it, which would mitigate the negative effect of the dings and allow the brass to not be excessively worn. It's a lot of work for a gas gun brass, and more useful in bolt gun brass life, but it's an option. A friend does a really low-tech, low cost, but effective brass annealing: He picks a ratchet socket that allows the brass to sit in it, attaches it to a variable speed drill, gets out his torch (one that goes on a coleman can) and slowly spins while heating the brass until he gets the right color, and drops it in a prepared area; repeat. A lot of work for quantity shooting rig, not necessarily a quality shooting rig, like a bolt action, but a good skill to have if someday one has to take extensive measures to preserve brass life and performance, for instance a shortage on brass.
    You could let the dings build up until you can't stand it, then do a session of annealing. Or you could buy new brasso_O
     
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  9. Cameron72

    Cameron72 Harrington, WA Bronze Supporter Bronze Supporter

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    Won't the dent be removed with firing and be replaced with a new dent so there is only one dent?
     
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  10. OutlawHoss

    OutlawHoss Klamath-Siskyou Well-Known Member

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    Could be. In my edu-macated theorizing, the brass may form back to chamber dimensions a bit (as in chamber fire-forming but not as thoroughly as a bolt gun) and get a new ding subsequently, but the the irregular increase in brittleness below the shoulder will only increase over time, creating another wear point to monitor in reloading your brass. I haven't seen (in my own LC brass that I load for my AR-10) the deflector dings just go away, but they don't seem to increase either, so that tells me they could be coming and going, and that means the brass is 'flexing' which means it increases brittleness.

    In overall performance it may be a minor change/factor, but at some point the brass will have to be discarded no matter what, so the whole annealing may be overkill for this kind of round.
    But it's a good skill to have, which I think in itself has its own merits.

    Another over-wrought idea from yours trulyo_O
     
    Last edited: Mar 3, 2016
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  11. Boboclown

    Boboclown North Carolina Well-Known Member

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    Try replacing the ejector spring.

    Also, where's the brass landing? 3 o'clock? 4? Just curious.
     
  12. 308

    308 ΜOΛΩΝ ΛΑΒΕ ΜOΛΩΝ ΛΑΒΕ Platinum Supporter Silver Supporter

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    You should see what my Tavor does to the brass :eek:
     
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  13. Libertas7

    Libertas7 Oregon Well-Known Member

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    As long as the ARs laugh facing down range it's all good. :D
     
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  14. coop44

    coop44 Tacoma ,WA Well-Known Member

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    OH MY GAWD!!!!!! DENTED BRASS!!! what ever shall we do? I think suicide will be your only way out! I'll bet you haven't had a BM in a week, after all AR does stand for Anal Retentive.The zombies will laugh at you, and your reloads will explode!! Bullets will be flying willy nilly allover the place, you can't get accuracy with dented brass. Yep you're a goner for sure.
     
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  15. PaulB47

    PaulB47 Hillsboro Well-Known Member

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    Ooh, I like the idea about the pad of velcro. Definitely giving that a try.

    I'd have some concern about the reloaded round chambering properly, with a dent like that. I liked another suggestion someone made about case guages, to take care of that problem.
     
  16. OutlawHoss

    OutlawHoss Klamath-Siskyou Well-Known Member

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    That is definitely something to watch. Resizing LC brass, I have on more than one occasion put too much lube and had the little dents that can happen. I've hemmed and hawed over the possible issues that might create, yet those rounds chamber fine. I think as long as the outside dimensions are the same (as the dent is concave) the brass is usable.
     
  17. Mikej

    Mikej Portland Gold Supporter Gold Supporter 2015 Volunteer 2016 Volunteer

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    I'm guessing there's a couple of :D:D to go with that response? I'm a hand gun shooter and re-loader. Long guns are a different animal so I'm just wondering. Loading shouldered brass, as far as I know, is somewhat different as far as reloading goes.

    Now those dents look to cause problems maybe, being into the shoulder?

    Like I said, it throws the brass in a small area 3:30-4:00 about 8'-10' away. I considered that a pretty good sign of consistency.
     
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  18. OutlawHoss

    OutlawHoss Klamath-Siskyou Well-Known Member

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    Definitely, consistency is directly linked to accuracy. It may be the dent issue is minor, but it's a good thing that a person notices and monitors these things, as they could indicate another issue, a developing issue, and generally makes one a better reloader, so it's not wasted time to at least ponder. I treat every round like it could be the one makes the difference in winning a competition, puts meat on the table, or saves a life. I think that is an appropriate mindset as people do get complacent, even the most experienced and wise among us.
     
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  19. Boboclown

    Boboclown North Carolina Well-Known Member

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    In that case, just try a new ejector spring.
     
  20. Velzey

    Velzey Estacada, Oregon Gunsmith Gunsmith Bronze Vendor Bronze Supporter

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    Do you have an adjustable gas block?

    I know how to make those dents disappear, but its a trade secret!!:D
     
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