Remington 9 1/2M (MAGNUM) PRIMERS

Discussion in 'Reloading' started by tbrice23, Jul 3, 2018.

  1. tbrice23

    tbrice23 Well-Known Member

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    Can anyone measure the outside diameter of a 9 1/2M magnum primer?
    I'm interested in buying some but I found a primer chart that concerns me about the O.D.
    20180703_174447.png Also, are the primer cups harder / thicker than regular LR primers?
    Further, is anyone using these as their primary Magnum primer? Lastly, how they compare in braisence (hotness) with other Mag primers?

    Thanks guys.
     
  2. Rich Coyle

    Rich Coyle Well-Known Member

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    I measured two: .2245", .2240"
     
  3. tbrice23

    tbrice23 Well-Known Member

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    That is too big, do you mean .212" ??
     
    Last edited: Jul 3, 2018
  4. FEENIX

    FEENIX Well-Known Member

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    I got .211(1), .210(8), .209(1) = AVG of .210"
     
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  5. tbrice23

    tbrice23 Well-Known Member

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    Thanks Feenix, I believe you prefer these in one of your rifles (300wsm???)

    Do you feel it is a lot easier to seat these compared to say 215 or 250 ?
     
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  6. FEENIX

    FEENIX Well-Known Member

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    You are correct >>> https://forums.gunbroker.com/topic.asp?TOPIC_ID=660324

    I have to be honest, I cannot tell which ones are easier to seat. CCI250 is still my go to magnum primer followed by 215M, WLRM, and then 9 1/2M.
     
  7. Rich Coyle

    Rich Coyle Well-Known Member

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    You caught me. I should have put on my glasses for close work.
     
  8. tbrice23

    tbrice23 Well-Known Member

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    Ha ha, I hear ya.

    Thanks guys.
     
  9. just country

    just country Well-Known Member

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    morning, Feenix, question, why due u prefer CCI
    250 over Fed. 215's? curious. justme gbot tum
     
  10. FEENIX

    FEENIX Well-Known Member

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    Perhaps I had more personal success with it than any other primers throughout my reloading experience, nothing else - a personal preference.
     
  11. bigedp51

    bigedp51 Well-Known Member

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    I just bought 300 once fired Lake City 7.62 cases and had to uniform the primer pockets to get the Remington 9 1/2 to seat below flush. I normally uniform my primer pockets and I was hoping the LC cases would have deeper primer pockets and not have to remove as much brass.

    I thought this strange because I have a military drawing for the LC 7.62 case. And the drawing shows the primers to be .008 below flush.