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Thread: New IMR powders

  1. #1
    Senior Member
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    New IMR powders

    I see IMR is at it again with a couple of slow powders for the large mag cases. IMR 7977 and 8133 are supposed to be good for the large cases and are not sensitive to temp changes. I will have to give them a try in my 264 win mag as my favorite powder H870 is no longer available. I have a good supply of H870 but a guy can use a pound in a hurry. Any users of these new powders?

  2. #2
    Resident Combine Pilot JustBen's Avatar
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    Still working through my stash from the last shortage.

  3. #3
    Senior Member Grey_Wolf's Avatar
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    I have yet to find one that works for me - on a variety of cartridges

  4. #4
    Super Moderator Rory McCanuck's Avatar
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    I haven't used any of the new Enduron powders, but I have heard good things.
    I'm tempted to investigate, but I haven't heard 'Use the new IMR XXXX, it'll make you want to throw away your 4350.'
    Don't blame me, I didn't vote for that clown. Oct 20, '15

  5. The Following User Liked This Post By Rory McCanuck

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  6. #5
    Canadian ForcesMember 6MT's Avatar
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    I was thinking of trying the 7977 a year and a half ago when it was introduced for my magnum (.338LM). I never took that plunge though because I got a great deal on three 8lb packs of the Retumbo ($270 each).

    But the 7977 does sound intriguing.

  7. #6
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    Ya I don't need to buy more powder for a long time, stocked up when WSS went tits up.

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