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Thread: Why do I have bright spots on the case rim?

  1. #1

    Why do I have bright spots on the case rim?

    I just bought a new rifle in 6.5 creedmoor. This is my second rifle in this caliber and when I shot it today I noticed bright spots on the rim of every case. Is this over pressure? It's the same loads I used in my other rifle and this never occurred. I'm using a 120 gr. nosler ballistic tip with 38.0 grains of Varget and a Winchester LR primer. Max load is 40 grains. The primer is not flattened or cratered so I'm not sure what to do. Any help is appreciated.

  2. #2
    Graduate JMW4570's Avatar
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    It could be.. Do you get the shiny spot just by closing the bolt on on a live cartridge? Is the bolt sticky or hard to turn after firing? Is the mark a surface mark or indention?
    Weapon of Choice: Illudium Q-36 Explosive Space Modulator bolted to a crappy old T53 stock

  3. #3
    Graduate Airgator0470's Avatar
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    What rifle?

    Maybe the case is not square with the bolt face...?

    Rough bolt face?
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  4. #4
    Graduate NJC's Avatar
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    Chamber and eject a round without firing of you can and see if it's due to part of the process there or something that happens when the round is fired ?
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  5. #5
    I just chambered and ejected a round and it did not do it. The bolt is a little hard to turn after firing but it's not real bad. The rifle is a Ruger Hawkeye Predator.

  6. #6
    The mark is just a surface mark.

  7. #7
    Sultan of Tin Foil Jafar's Avatar
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    Since the fired round is "gripping" the chamber after expanding from firing, it sits stationary while the bolt rotates to unlock. The mark left is the steel ejector making a drag mark. The brass is softer than steel, so it will mar a little bit. The reason it doesn't do it with an unfired round is due to the casing being able to rotate with the bolt during feeding and extracting.

  8. #8
    Graduate JMW4570's Avatar
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    Since you are running reloaded cartridges, could the head spacing between the two chambers be a little different? I've see that before.

    Other ideas: New rifle: Strong ejector spring leaving a mark?
    Weapon of Choice: Illudium Q-36 Explosive Space Modulator bolted to a crappy old T53 stock

  9. #9
    Sultan of Tin Foil Jafar's Avatar
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    Quote Originally Posted by JMW4570 View Post
    Other ideas: New rifle: Strong ejector spring leaving a mark?
    It definitely amplifies the situation, not to mention the sharp, new edge on the ejector that will develop a radius after a few hundred rounds.

  10. #10
    Thanks for the help I think yall are right I just wanted to make sure it was safe before I loaded any more ammo. I will drop back to the starting load and see if it still does it.

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