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New brass prep for AR10

Discussion in 'Handloading and Reloading' started by mshootnit, Nov 28, 2018.

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  1. mshootnit

    mshootnit Member

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    OK we have some new RP brass for AR10 reloading. What would be your initial procedure. Do you need to run it through a small base die first? This is new unfired brass. Also: some of the flash holes are off center in this batch: Issue or no?
    Let me know how you would prep it.
    I was thinking running expander ball through to uniform it, then trim deburr chamfer. Thanks!
     
  2. someguy2800

    someguy2800 Member

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    I would personally just check them for length and load them. The off center flash holes don't seam to really affect anything in my experience.
     
    cheygriz likes this.
  3. Blue68f100

    Blue68f100 Member

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    Necks normally get dinged during shipping/handling. At a minimum I would run a expander through them to make sure the necks are round. This also will help remove any preservative they may have on the brass to reduce tarnishing. As for off center flash holes, it depends on how far their off. A little will not hurt but if its alone the edge your going to have a problem.
     
  4. Robert101

    Robert101 Member

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    Unless you are wanting precision ammo, just reload and shoot. I would be more concerned about non-centered primer holes. If your reloads are moderate and not upper range, it shouldn't be much of an issue. All of my brass, and I have many head-stamps, are all centered. Get some good brass even if it is once fired.
     
  5. mshootnit

    mshootnit Member

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    This brand new RP brass. I am assuming others have seen fkash holes off center?
     
  6. Varminterror

    Varminterror Member

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    Hopefully easy questions to guide your decision making process:

    What are you wanting to do with these loads in your AR-10? Hunting? Blasting? Plinking? Glassed Gas Gun bench rest? 3 gun? Precision long range?

    How many of the lot have off center flash holes?

    Do the empty cases, current state, close into battery in your rifle?
     
  7. Toprudder

    Toprudder Member

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    Rifle brass prep is one of the least enjoyable parts of reloading for me. But, I will always fully process any new brass, otherwise you just don't know the condition. I would full-length resize and trim and treat it as if the brass were once-fired.

    I don't think the off-center flash holes will affect much, except possibly for any operation that involved poking something through the hole. This would include decapping (possibly broken decapping pin), using a Lee mandrel neck sizer (aligns the mandrel with a pin through the flash hole, possibly causing run-out) or any of the trimmers that reference through the flash hole (like Lee or Lyman, this could cause the trimmed brass not to be square).
     
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