primer pocket off center

Discussion in 'Ammunition & Reloading' started by Letus, May 16, 2018 at 10:58 PM.

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  1. Letus

    Letus
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    Found quite a bit of off center primer pocket cases with this head stamp, is this normal?

    B5203C69-3987-4B3E-88E8-20D2CCBBD35C.jpeg
     
  2. Mygrainman

    Mygrainman
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    Looks more like the military crimp was cut out at an angle making it look off center... it should be just fine. It is very common for the flash holes to be slightly off center.. also not an issue.
     
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  3. Letus

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    It’s quite off center, look at the edge of the markings
     
  4. MrRob96

    MrRob96
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    Looks fine to me. Maybe a bit out of round and a little bit off center.

    If you aren't breaking decapping pins, and your new primers are going in without much fuss, I wouldn't worry about it.
     
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  5. Mygrainman

    Mygrainman
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    Have you measured with calipers?...
    It appears in the pic to be the way the edges are rounded making it look off center... pictures can be deceiving though.
     
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  6. Letus

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    1E2D8EA6-4344-4308-B899-BDA35E158214.jpeg FFA1F09A-655C-4422-A648-0DE856BEBB22.jpeg
     
  7. Letus

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    it’s not that bad but I kinda wonder how they make those cases. Some are worse than others.
     
  8. po18guy

    po18guy
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    Hard to imagine how that would/could happen during the manufacturing process. May be Brazilian military surplus. I would not expect it to provide match-grade accuracy, but it went "pop" once, so probably will again.

    Is the head diameter .378 or close? It could be the rim itself that is off, non-concentric, and not the primer pocket or flash hole.
     
  9. Mygrainman

    Mygrainman
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    I’m a curious insomniac, so I went down to the Mygrain silo and pulled a random case... decapped and measured...
    Similar results. My guess is it’s perfectly normal.

    B7928F07-CB65-403C-BB31-D788454829A6.jpeg 03CE7414-00CC-49E1-96E3-12C0F0D80A46.jpeg 280F2443-7783-4779-B163-D2DD850F8C5D.jpeg
     
    Last edited: May 17, 2018 at 12:43 AM
  10. Certaindeaf

    Certaindeaf
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    Is it blasting ammo or high precision? If it's the latter, every measurable thing is taken into account. If it's just for blasting, remember, the flash hole for muzzle loaders is generally way off from center.. with nary a problem.
     
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  11. Mygrainman

    Mygrainman
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    CBC is Magtech.. Brazilian made. I’m not sure if they have different grades of brass, or if they have improved dramatically over the last 8 years, but this stuff is amazingly accurate. I get 1/2 moa out of my 18” noveske barrel with it. It’s a Mk262 77g otm just as good, but half the price of Blackhills.
    946E0CE3-5EF2-4D80-913C-C929009A12D4.jpeg
    I investigated further, and decapped a couple Magtech(same brand as OP)from my last range trip... known very accurate, a couple lake city from m855 federal, and a couple federal from AE 55grain.
    All of them had at least .005 difference at the most extreme.
    The lake city was unsurprisingly the best.
    0B55DBBA-F370-441F-B6C0-A056E9578DAC.jpeg
     
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  12. P7id10T

    P7id10T
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    It's not too off-center, your OCD is too precise. :D

    Primers are pretty forgiving and tend to self-align when being pressed in.
     
  13. Dyjital

    Dyjital
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    The flash hole looks centered though.

    I see no issues. May be a little difficult when you swage that crimp out.
     
  14. v0lcom13sn0w

    v0lcom13sn0w
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    its normal
     
  15. Tilos

    Tilos
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  16. 2ndtimer

    2ndtimer
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    It looks a lot better than some of the Fiocchi brass I have encountered. (Which, by the way, also loaded and worked fine).
     
  17. Letus

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    I don’t doubt that they will load and work fine. I wonder if anyone has any accuracy problem with them?
     
  18. po18guy

    po18guy
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    One way to find out. Separate 10 with off-center pockets and ten with centered pockets. Load identically and shoot on the same day.
     
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  19. Tilos

    Tilos
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    This thread seems to be going in the same direction of most threads you have started in the past...
    You get some well thought out/explanations/answers, you come back with a "I know that" type response, and add/ask another question.
    I can't wait for your response to @po18guy
    :D
     
    Last edited: May 17, 2018 at 9:17 PM
  20. po18guy

    po18guy
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    And have someone else load the magazines for a blind accuracy test.
     

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