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Reloading Berger Bullets


30-378 Help

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Unread 04-02-2007, 06:21 PM
Junior Member
Join Date: Mar 2004
Location: Telford, PA
Posts: 13
30-378 Help

Hey guys, long time reader, less than occassional poster. I need some help. I have an awesome 180 Barnes TSX - Retumbo load for my Weatherby Accumark, but I was wondering if anyone has any favorite loads for the 200gr Sierra MK. I also have 10+lbs of IMR 5010 but can't seem to figure what a good starting and max load should be. IMR will not comment other than it was MilSurp for the 50BMG and I know I can't do a head to head with H5010. Is it safe to start with that load data and work up.?
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    Unread 04-03-2007, 07:47 AM
    Silver Member
    Join Date: Sep 2001
    Posts: 301
    Re: 30-378 Help

    Take a look here. Some loads are a tad hot for my sako TRGS so start at least in the middle and work up.
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    Unread 04-03-2007, 09:44 PM
    Silver Member
    Join Date: Dec 2001
    Location: Pennsylvania
    Posts: 230
    Re: 30-378 Help

    My favorite load for my Accumark barrel was 200 gr Accubonds and 106gr Retumbo.

    103 H1000 with 200mks was pretty good too.

    I don't really work loads up, I find out what the boundaries are from the get-go. If I had 10 lbs of unknown burn rate powder thats most likely slower than H1000 I would start at 100gr and do single loads jumping 2 grains up until I saw signs I didn't like, then do ten one grain incremental loads under max sign indicated powder level for a rough ladder at 3-4 hundred yards, and then whatever method works after that.
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