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New Rifle Build What Primers

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Unread 12-06-2007, 06:17 PM
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Join Date: Apr 2007
Posts: 101
New Rifle Build What Primers

Being new to the reloading game (I have only reloaded for my .204) I am curious as to what primer I should use for a new coyote gun I just had built. It is a 6x47 or 6mm-.222 rem mag. I have been using small rifle magnum primers for my .204 are those ok for this round as well? If it matters I am loading some up with Win 748, H322 and IMR4895.
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    Unread 12-08-2007, 05:41 PM
    Platinum Member
    Join Date: Jun 2004
    Location: Texas
    Posts: 1,074
    I don't have much experience with small rifle primers, but as a general practice, I start everything off with Remington primers. The cups are relatively soft and show pressure very well. They usually shoot well, too.

    If you develop a load with a magnum primer, and it shoots well, use it, but if you have a load using std primers, back off on the powder charge before trying a magnum primer. Not everyone agrees that this is necessary, but I would do it.

    Watch the 748 loads. Friends who shot it in .223 matches told me that it dropped a lot of pressure in very cold conditions. That was several years ago, and may not apply now. They may have stabilized it.

    The trick for me is to find a bullet the barrel likes, and a load with low std deviation, and get them together. You will need a chronograph.

    Enjoy your project. Good shooting, Tom
    Texas State Rifle Association Life Member
    NRA Endowment Life Member

    A big fast bullet will beat a little fast bullet every time
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    Unread 12-09-2007, 05:31 PM
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    Join Date: Jan 2007
    Location: Ohio
    Posts: 167
    I have a pile of different primers around here and use them all for different things. I have found that for .223, .222mag, . .17 Rem, .204 and other similar size cases that the 7 1/2 Rem. primers usually give the best accuracy.
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    Unread 12-12-2007, 12:41 PM
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    Join Date: Apr 2007
    Posts: 101
    Thanks for the advice guys. I will take it.
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    Unread 12-12-2007, 02:48 PM
    alf alf is offline
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    Join Date: Nov 2007
    Location: S. W. Wisconsin
    Posts: 717

    Remington 6 1/2 primers may have the softer cups.
    Definitely not 7 1/2's. These tend to have tougher cups.
    7 1/2's are my go to primers in the small cases.
    I have a 6 X 47 Improved with a 45 degree shoulder.
    It used to be a LV on my Panda in PPC for 2000rds. Then cut off
    & chambered in 6 X 47 IMP for the last 5700 rds. for P.D.'s.
    Getting pretty long in the tooth, but still shoots.
    Nothing but 55gr. Noslers and AA-2230C.

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