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Thread: Primer cup hardness

  1. #1
    Join Date
    Apr 2003
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    South Australia
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    Primer cup hardness

    Well down here in Australia it looks as though there might be another primer shortage coming up.
    So...to settle an argument...which primers have the hardest cups? I have a small supply of a number of brands.
    I normally use 205M's for competition work, and either Fiocchi or standard 205's in my varmint rifles.

    Cheers

    BA

  2. #2
    Join Date
    Jun 2004
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    Don't have any idea if they are available there but I've had good success with CCI 41's. There seems to be no difference in load development and I've yet to pierce one even with a very hot load.

    Rick

  3. #3
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    Feb 2003
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    George Kelbly has said for years there is no difference between the 205M and the 205. Now I am talking Federal. I stand to be corrected on this, read it JIM and let me know, yet there is a difference of avaidibiltiy and $5.00 per hundred, and I don't think George is cheap. I would love to spell.

  4. #4
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    Nov 2004
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    Primerhardness

    Maybe they need to be annealed so their all the same.

  5. #5
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    Thumbs up

    Quote Originally Posted by Don Nielson View Post
    Maybe they need to be annealed so their all the same.
    +1

  6. #6
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    Quote Originally Posted by Bill Gammon View Post
    George Kelbly has said for years there is no difference between the 205M and the 205. Now I am talking Federal. I stand to be corrected on this, read it JIM and let me know, yet there is a difference of avaidibiltiy and $5.00 per hundred, and I don't think George is cheap. I would love to spell.
    You are correct Bill. Only an extra visual inspection check. My Remington primers have a harder primer cup than my Federal or Winchester.

  7. #7
    Join Date
    Feb 2003
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    Bill and Butch are correct on the Federal primers. Currently CCI seems to have the hardest cups out there with Remington coming in second and Federal with softest cups. This last year we have seen a real problem with CCI being even harder, especially on the CCI 450 primers. A lot of people have trouble set off the 450's. Other brands of primer then these above I could not comment on how they are for hardness or performance.

    Jim

  8. #8
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    Quote Originally Posted by Don Nielson View Post
    Maybe they need to be annealed so their all the same.
    G'day mate....I'd like to see that!

  9. #9
    Join Date
    Nov 2006
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    ME
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    Are we takking about

    primer cup hardness(thickness being equal) or the differences in cup thickness between some primer makes?

  10. #10
    Join Date
    Mar 2008
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    Southern Minn
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    943
    I like the Tula SRM's. They seem to be as tough or tougher than CCI 450's , BRM 4's or any other as far as that goes.

  11. #11
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    Feb 2012
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    Quote Originally Posted by Bill Gammon View Post
    George Kelbly has said for years there is no difference between the 205M and the 205. Now I am talking Federal. I stand to be corrected on this, read it JIM and let me know, yet there is a difference of avaidibiltiy and $5.00 per hundred, and I don't think George is cheap. I would love to spell.
    If you have good scale like a GD503 and weigh a 1000 of each you will soon see the difference between the GM and the 205's...... jim

  12. #12
    Join Date
    Mar 2020
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    Third Tomb of Chritianity
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    I have tried the Magtech 7 1/2. For me has strong as CCI450.

    I will not make any supposition with regards to cup thickness or cup material strength. I have no measurement for this.

    I tried to use them on an old small firing pin Panda and had a lot of misfires.

    Meanwhile, have no misfire at all on my AK74s or 308 Win small primer pocket.

  13. #13
    Join Date
    Feb 2009
    Posts
    132
    Quote Originally Posted by James A. Kelbly View Post
    Bill and Butch are correct on the Federal primers. Currently CCI seems to have the hardest cups out there with Remington coming in second and Federal with softest cups. This last year we have seen a real problem with CCI being even harder, especially on the CCI 450 primers. A lot of people have trouble set off the 450's. Other brands of primer then these above I could not comment on how they are for hardness or performance.

    Jim
    Apparently Federal knew that the 205's were a bit softer than some other brands and even accused of having slam fires in AR rifles, Federal now makes 205MAR primers that have a harder cup so you can have it both ways

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