300 RUM?

Discussion in 'Big Stuff -- 6.5mm, 7mm, 30 Cal' started by Scalloper, Feb 13, 2019.

  1. ebb

    ebb

    Joined:
    Oct 31, 2010
    Messages:
    1,684
    I had an issue with Retumbo that I thought was weird. I had some loaded ammo that worked well in hot Florida temps. About a year later I shot the same ammo in Tennessee, a little bit cooler and it was an over pressure. I had to come down 4 grains to get a working load. The powder was out of the same 8 lb jug. I felt like the powder had gotten hotter over the time between loading sessions?????
     
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  2. Scalloper

    Scalloper

    Joined:
    Mar 17, 2012
    Messages:
    47
    Thanks all. I just got the scope mounted two days ago and put 12 factory rounds through it to get zeroed.
    I just loaded up 2 batches of 5 ea with different seating depth. 90 gr Retumbo and 210 Berger’s. It’s cool here at 25-40 dog so I will start there.
     
  3. murray brook

    murray brook Silver $$ Contributor

    Joined:
    Aug 8, 2015
    Messages:
    203
    This would be an interesting thread for you to read on LRH

    https://www.longrangehunting.com/threads/how-to-blowup-your-rifle.196142/
     

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