Primers for 12 gauge

Primers for 12 gauge

This is a discussion on Primers for 12 gauge within the Reloading forums, part of the Defensive Ammunition & Ballistics category; New to reloading shotshells. In fact, haven't started yet. waiting for my manuals to be delivered via Amazon. Primers? 209 or 209M. Which Primer for ...

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Thread: Primers for 12 gauge

  1. #1
    Member Array ConcealedinPA's Avatar
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    Primers for 12 gauge

    New to reloading shotshells. In fact, haven't started yet. waiting for my manuals to be delivered via Amazon. Primers? 209 or 209M. Which Primer for which load? I assume M is for magnum. Are they a preference? Are they for heavier Loads?(shot weight?) Just some things I'm thinking about while waiting on my manuals. Thanks
    S&W M&P 9c
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  2. #2
    VIP Member Array Tubby45's Avatar
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    M is a magnum primer. Use exactly the same components as listed in the data. Do not substitute primers as pressures can drastically spike. Magnum primers are sometimes used for harder to ignite powders.
    07/02 FFL/SOT since 2006

    Probably the only home based FFL that doesn't do transfers.

  3. #3
    VIP Member Array OldVet's Avatar
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    Ditto. Go with what the data calls for with your prefered powder and shot load. Brand of primer isn't that relivant, but don't mix/match magnums and no-magnums.
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