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Thread: Pressure signs in factory ammo?

  1. #1

    Pressure signs in factory ammo?

    Following my thread about factory ammo shelf life, I took some of my recent purchase of 19 year old S&B 8x57 ammo to kynamco to be test fired as it will be a while before I can pick up my new rifle. The results showed a pressure of 19.1 which I was told seemed quite high, but also out of the three rounds we tested one showed pressure signs on the primer that, had it been a homeload I would be sorely questioning. Please see the pictures, not the easiest to demonstrate but here goes....(it's the middle one that is of concern.....)
    Opinions are like arseholes....... we all have them, and most of them stink

  2. #2
    19.1 what?
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  3. #3
    Do not see any pressure signs there, maybe they want to sell you some ammo!
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  4. #4
    Quote Originally Posted by Sauer90 View Post
    19.1 what?
    . Honestly not sure!

    Quote Originally Posted by Sauer90 View Post
    Do not see any pressure signs there, maybe they want to sell you some ammo!
    Definitely not, I know them well, there was no question of that, they were simply helping me out testing these rounds and putting the data through their testing system... There are distinct signs on the Middle round that show the primer has been flattened, but it's not easy to photograph unfortunately.
    Opinions are like arseholes....... we all have them, and most of them stink

  5. #5
    They are not what I would call flattened either as they still have rounded shoulders on the primers. Flattened primers are not a sure indicator of pressure only one possible indicator.
    It's the calibre of the shooter that counts not the calibre of the rifle.

  6. #6
    Nothing remotely 'flattened' there.
    Primers are not a reliable indication of pressure in the end.
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  7. #7
    nah...thats not flattened...

    This is flattened!



    yours look fine
    you do have mild cratering possibly from an undersize pin/oversize hole situation but its nothing to worry about

  8. #8
    Click image for larger version. 

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    Cartridge on the right has a flattened primer, not necessarily an indication of overpressure in itself.
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  9. #9
    I've had the same worries with S&B ammunition in the past, but have been told that it's common with their cartridges as the primers they use are quite soft.

  10. #10
    Quote Originally Posted by Tartan_Terrier View Post
    I've had the same worries with S&B ammunition in the past, but have been told that it's common with their cartridges as the primers they use are quite soft.
    That was also suggested by kynamco, they said they only use S&B primers on humane killing rounds where the strike isn't always as forceful as on a rifle......
    Opinions are like arseholes....... we all have them, and most of them stink

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