primer pocket off center

Discussion in 'Ammunition & Reloading' started by Letus, May 16, 2018.

Tags:
  1. Letus

    Letus
    Aloha
    Bronze Supporter Bronze Supporter

    Messages:
    234
    Likes Received:
    271
    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
    SW WA
    Welcome to the snipe hunt Gold Supporter

    Messages:
    2,699
    Likes Received:
    8,825
    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.
     
    2ndtimer and Letus like this.
  3. Letus

    Letus
    Aloha
    Bronze Supporter Bronze Supporter

    Messages:
    234
    Likes Received:
    271
    It’s quite off center, look at the edge of the markings
     
  4. MrRob96

    MrRob96
    Greater Tacoma Area
    Silver Supporter Silver Supporter

    Messages:
    627
    Likes Received:
    1,151
    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.
     
    2ndtimer and Letus like this.
  5. Mygrainman

    Mygrainman
    SW WA
    Welcome to the snipe hunt Gold Supporter

    Messages:
    2,699
    Likes Received:
    8,825
    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.
     
    joken likes this.
  6. Letus

    Letus
    Aloha
    Bronze Supporter Bronze Supporter

    Messages:
    234
    Likes Received:
    271
  7. Letus

    Letus
    Aloha
    Bronze Supporter Bronze Supporter

    Messages:
    234
    Likes Received:
    271
    it’s not that bad but I kinda wonder how they make those cases. Some are worse than others.
     
  8. po18guy

    po18guy
    Queen County, WA
    Gold Supporter Gold Supporter

    Messages:
    466
    Likes Received:
    1,103
    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
    SW WA
    Welcome to the snipe hunt Gold Supporter

    Messages:
    2,699
    Likes Received:
    8,825
    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
  10. Certaindeaf

    Certaindeaf
    SE Portland
    Bronze Supporter Bronze Supporter

    Messages:
    13,429
    Likes Received:
    24,567
    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.
     
    v0lcom13sn0w and P7id10T like this.
  11. Mygrainman

    Mygrainman
    SW WA
    Welcome to the snipe hunt Gold Supporter

    Messages:
    2,699
    Likes Received:
    8,825
    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
     
    Letus, Camelfilter and Certaindeaf like this.
  12. P7id10T

    P7id10T
    Dysfunction
    Turlututu chapeau pointu Gold Supporter 2018 Volunteer

    Messages:
    3,632
    Likes Received:
    7,798
    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
    Albany, Ore
    Flavorite Member Bronze Supporter

    Messages:
    7,178
    Likes Received:
    12,026
    The flash hole looks centered though.

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

    v0lcom13sn0w
    Keizer
    This title is LCS CUSTOM! Gold Supporter

    Messages:
    7,044
    Likes Received:
    20,297
    its normal
     
  15. Tilos

    Tilos
    Idaho
    Silver Supporter Silver Supporter

    Messages:
    384
    Likes Received:
    388
  16. 2ndtimer

    2ndtimer
    SE Washington state
    Bronze Supporter Bronze Supporter

    Messages:
    497
    Likes Received:
    488
    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

    Letus
    Aloha
    Bronze Supporter Bronze Supporter

    Messages:
    234
    Likes Received:
    271
    I don’t doubt that they will load and work fine. I wonder if anyone has any accuracy problem with them?
     
  18. po18guy

    po18guy
    Queen County, WA
    Gold Supporter Gold Supporter

    Messages:
    466
    Likes Received:
    1,103
    One way to find out. Separate 10 with off-center pockets and ten with centered pockets. Load identically and shoot on the same day.
     
    mkwerx likes this.
  19. Tilos

    Tilos
    Idaho
    Silver Supporter Silver Supporter

    Messages:
    384
    Likes Received:
    388
    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
  20. po18guy

    po18guy
    Queen County, WA
    Gold Supporter Gold Supporter

    Messages:
    466
    Likes Received:
    1,103
    And have someone else load the magazines for a blind accuracy test.
     

Share This Page