Sierra Outdoor Supply
+ Reply to Thread
Results 1 to 6 of 6

Thread: Backed out primers

  1. #1
    Join Date
    Mar 28, 2001
    Location
    Sacramento
    Posts
    737
    Thanks
    1
    Thanked 2 Times in 2 Posts

    Default

    What can cause a primer to back out. I was at the range this weekend and first few primers backed out a little. What can cause this? What else do I need to look for? 30-06 with Barnes TSX minimum powder
    Thanks

  2. #2
    Join Date
    Aug 25, 2003
    Location
    Torrance, CA
    Posts
    1,310
    Thanks
    0
    Thanked 11 Times in 10 Posts

    Default

    Excessive head space could cause that. Take it to a smith and have the head space checked. Over pressure load could also contribute.
    Hunting and fishing are not matters of life or death. They are much more important than that.

  3. #3
    Join Date
    Dec 11, 2006
    Location
    Vandenberg Air Force Base, California
    Posts
    2,814
    Thanks
    4
    Thanked 141 Times in 135 Posts

    Default

    If your load is too light, the case won't set back and you could see the primer moved back in the case. The more likely cause is old cases and the primers are too loose in the pocket from an overpressure load or loaded too many times.
    "The Sharps made the west safe for Winchesters."

  4. #4
    Join Date
    Jan 29, 2002
    Location
    Bozeman, Montana.
    Posts
    5,547
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    Yep - most likerly light loads like 410 said. If you're shooting factory ammo without the same issue, headspace should be OK.

  5. #5
    Join Date
    Mar 28, 2001
    Location
    Sacramento
    Posts
    737
    Thanks
    1
    Thanked 2 Times in 2 Posts

    Default

    The problem went away as the powder charge increased. Brand new cases, light on the IMR4350 52 or 53g off the top of my head, according to Barnes #4. Cases were not bulged and primers were not rounded. I guess if the load is too ight it may do that.

  6. #6
    Join Date
    Dec 11, 2006
    Location
    Vandenberg Air Force Base, California
    Posts
    2,814
    Thanks
    4
    Thanked 141 Times in 135 Posts

    Default

    Bingo. You don't get enough pressure to set back the case into the bolt, allowing the primer to back up. Thought that might be the problem. That by the way is an indication of a load to bump up a bunch.
    "The Sharps made the west safe for Winchesters."

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts