30-378 Weatherby load advice

Discussion in 'Reloading' started by cmfi3, Feb 29, 2008.

  1. cmfi3

    cmfi3 Well-Known Member

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    Going to start loading for the 30-378 weatherby accumark. Looking for suggestions from those who have experience loading for this cartridge and rifle. Thinking about 200 gr. AB and/or 180 gr. TSX. Looking for some ideas for a "hunting" round out to 700 yds and any loading suggestions for this caliber. Thanks
     
    Last edited: Feb 29, 2008
  2. DesertDiesel

    DesertDiesel Well-Known Member

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    I've tried H1000, H4831SC, H50BMG, & RL22 with 180 accubonds and 200 SMKs. The best load I have so far from my accumark has been 117 grains of H50BMG with a 200 grain SMK. WMLR primer. OAL of 3.645". I was able to get a .345" group from 100 yards. I still have a lot more testing to do at 200 yards for accuracy. I also plan to try some 220 and 240 grain SMK's when I can get my hands on some.

    Used the 200 SMK load last year to take a bull elk from over 600 yards. One shot, quick kill. Personally I wouldn't shoot less than 200 grain bullets for LR purposes.
     
    Last edited: Mar 1, 2008
  3. kraky2

    kraky2 Well-Known Member

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  4. cmfi3

    cmfi3 Well-Known Member

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    thanks for the info guys, im thinking I may start with 200 gr. AB with some H50BMG as soon as I can get my hands on some. Desertdiesel, what kind of velocity are you getting out of your 200 gr SMK/H50BMG?
     
    Last edited: Mar 1, 2008
  5. DesertDiesel

    DesertDiesel Well-Known Member

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    It was in the ball park of 3200 at the muzzle...
     
  6. mtmuley

    mtmuley Well-Known Member

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    Heck, My RUM does 3200 fps with a 200 gr bullet. With 92 gr of powder. mtmuley
     
  7. DesertDiesel

    DesertDiesel Well-Known Member

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    I hear you Mtmuley...I plan to try some 220 and 240's. I read where guys are getting the same velocity (3200 range) with 220 grain bullets.
     
  8. mtmuley

    mtmuley Well-Known Member

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    Diesel, We've crossed paths before, I think. Amazing how the big WBY and the RUM are so close with 26 inch barrels. Mine wears the factory 26, but maybe a Lilja 27 next. But, I also carry my rifle miles a day sometimes. Ever try RL-25? mtmuley
     
  9. Iron Worker

    Iron Worker Well-Known Member

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    My 300 RUM same velocity with less powder

    Dang isn't it typical of Weatherbys to require 5 to 10% more powder to equal or just a few feet above standard Mags. With 95grs of Retumbo my 300 RUM produced 3,200 FPS. 117grs OF POWDER FOR WHAT???????????????
     
  10. DesertDiesel

    DesertDiesel Well-Known Member

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    Easy there firecracker....comparing retumbo to H50bmg is comparing apples to oranges. The velocities that I have used are based off of quickload data, Hodgdon, and sierra published information. I know it is not the most accurate, but it gives me a ball park speed to start with as I don't have easy access to a crono. If you are getting 3200 from 92 grains of retumbo, my hat is off to you, you are getting 150 fps more than Hodgdon claims....but like I said, I don't have crono data for the 30-378.

    MtMuley,
    I plan to do the same thing, there is 28" Lilja in my future.
     
  11. Coues Sniper

    Coues Sniper Well-Known Member

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    I'm not sure the 300 RUM is the most efficient casing ever invented either ;)
    I know, I have one.
     
  12. mtmuley

    mtmuley Well-Known Member

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    Diesel, I believe Ironworker uses 95 grains of Retumbo, which would produce the 3200 fps he claims. I use 92 grains of RL-25 for 3200 fps, which I have done through my chronograph. And no, the RUM isn't THE most efficient. But of the two here I guess it is. mtmuley
     
  13. Coues Sniper

    Coues Sniper Well-Known Member

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    Agreed :cool:
     
  14. J E Custom

    J E Custom Well-Known Member

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    Cmfi3

    Desert Diesel is right on.

    My best loads were with H 50BMG.

    180gr xbt ,120gr 50 BMG,fed 215M at 3431ft/sec with a 100yrd
    5 shot group of .091.

    200gr partition,116gr 50BMG,fed 215M at 3273ft/sec with a 100 yrd
    5 shot group of .197.

    My barrel is a 27'' select match shilen.

    These are hunting loads and not real hot,(easy bolt lift for follow up
    shots if needed)but so far I have not needed a second shot.

    J E CUSTOM