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45acp Primer Hole Question

Discussion in 'Handloading and Reloading' started by Vacek, Dec 10, 2010.

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  1. Vacek

    Vacek Member

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    I have cleaned up and resized several hundred 45acp brass I purchased from my gun range... pick up brass they sort and sale. Many of the Winchester brass has flash holes twice the size of the rest. What gives????
     
  2. atblis

    atblis Member

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    There are two sizes of pistol primers

    Large pistol
    and
    Small pistol
     
  3. Walkalong

    Walkalong Moderator

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    As far as flash holes go, they went to small flash holes with the new primer that's good to shoot inside. I forget what they called it. The larger flash holes they had been using caused problems with the new "clean" primer. It makes virtually no difference. Load them and shoot them. I used to segregate them, but no longer do.

    Something like that anyway. My brain is still asleep. Bottom line is don't worry about it.
     
  4. atblis

    atblis Member

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    Oh, the flash holes. Was thinking pockets obviously. Huh that is interesting.

    I thought they were calling them NT (Non Toxic).
     
  5. jcwit

    jcwit Member

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    He's talking flash holes not primer pockets. Large flash holes means the cases came from the new safe non toxic primers usually used in indoor ranges.

    Beat me to it Walkalong!
     
  6. BigBob3006

    BigBob3006 Member

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    Vacek,

    Just my wild guess, but doesn't the +P ammo line of ammo come with a larger than normal sized flash holes? That's the only thing I can think of. Check the face of the case , I think +P would be indicated.
     
  7. rcmodel

    rcmodel Member in memoriam

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    Winclean NT and other brands of lead-free ammo uses Sm Pistol primers with very large flash holes.

    The lead-free primer mix is much more violent then normal primers, and early on, they were causing breech face peening in some guns with Lg primers & small flash holes that built up too much pressure in the primer pocket.

    They then went to small primers, 1/8" or larger flash holes, and crimped primer pockets to lower the primer pocket pressure and prevent gun damage from primer set-back.

    You can load them normally.
    Just don't mix Sm crimped & Lg primer cases in your Dillon case feeder!!!

    rc
     
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