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any reason to NOT use magnum primers

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4 comments

  • FrancF
    My rule is if you use Mag primers drop your powder charge buy 1/2 grain.
    Pistol might be diff. But, I have found on hot days in my varmint guns powder that reacts to temp changes like h380 and a few others, it can be a bad thing if your pushing the limit (Max) powder.

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    NRA Life Endowment Member

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  • perry shooter
    Hello one reason may be that the cup is harder/thicker to withstand high pressure loads and if you have a pistol with modified / weak fireing pin hits it could lead to misfires. "PRAISE THE HARD-BALL GUN"
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  • lawdog44
    be careful of powder choices use of mag primers couid result in high pressure this is compounded by bullet seating depth in pistol
    rounds like the 9mm,40sw,& 45 apc also reduction in powder charge
    in some cases like in the use of H-110 could result in detonation
    instead of powder burn resulting in damage to fire arm and or injury
    to yourself or bystanders I have been reloading about 25 years and
    have seen these things happen . good shooting [:)][:)][:)]
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  • 1911a1-fan
    I use nothing but magnum primers in my 45's, now Winchester is making only "standard or magnum" large pistol primers, before you could get both, and I found that the magnums added about 30 fps, but you do get a cleaner burn on the powder, in addition I used your recipe with 231 always using magnum primers{when I used to use 231}

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