Sendero, 300 RUM load w/ 210 Berger?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by BCMAG2, Dec 25, 2012.

  1. BCMAG2

    BCMAG2 Well-Known Member

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    Hello. I'm new here, so bear with me.

    I have a Sendero in 300 RUM. I've been shooting 200 grain accubonds with disappointing groups (1") no matter what I do in terms of powder charge or COAL. I'm thinking of giving the Berger 210 a try. Does anyone have the perfect load worked up for the Berger 210 in their Sendero 300 RUM that they'd be willing to share? Would prefer to stay with the standard 3.60" COAL if possible so the factory magazine well will work.
     
  2. Cheyenne 1

    Cheyenne 1 Well-Known Member

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    You should consider the 215 hybrid. I load them for a buddy of mines 300 ultra Sendaro. With H-1000 it shoots under 1/2 inch. They didn't seem to be sensitive to seating depth and it didnt take a lot of effort to find an accurate load. One problem may be the Coal. His is too long to load in the mag .
     

  3. D.Camilleri

    D.Camilleri Well-Known Member

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    What powder charge did you use with the 215's? I just bought 100 of them and want to try them in my 300 rum
     
  4. Cheyenne 1

    Cheyenne 1 Well-Known Member

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    We were using 91grains of h1000. And they were around 2975fps And I think they were about 50 thou off the lands
     
  5. bigbuck

    bigbuck Well-Known Member

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    210 Berger
    85.5 Grains of Retumbo .
    Seated 22 thousandths off the lands.
    Federal 215 match primer.
    Remmy brass.

    MV 3,050 verified by my Exbal program.

    Shoots consistently 8 MOA at 1000 Yards
     
  6. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    8 moa at 1000?? or 8" at 1000.... 1 moa would be around 10" at 1000.
    sorry but I thought I'd ask.

    We've been using 180,190, and 225 hornady with either rl25, rl33, or rl50 here. 180's at 3300 fps, 190's at 3200 fps, and 225's at 3K fps at 1/2 moa (1") at 200. The 300 rum simply doesn't care what you feed it and both my bdl lh and my brother's sendero shoot about the same.
     
  7. BCMAG2

    BCMAG2 Well-Known Member

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    Thanks for the info. What COAL are you guys loading those 210s to? More than SAAMI 3.60"?
     
  8. bigbuck

    bigbuck Well-Known Member

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    I meant 8'' @ 1000 .
    I went to shoot at 1000 3 different times and I shot 7 1/4 '' 3 shot group then next time out I shot 7 3/8 '' 3 shot group and lastly I shot 8'' 3 shot group.

    I run the Extended box so I try and seat them as far as I can and then back off until I get good grouping.
     
  9. MontanaRifleman

    MontanaRifleman Well-Known Member

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    I worked up a good load with the 210's in my Sendero with Retumbo, however the COAL was 3.865 just touching the lands. 93 gr, 3130 fps and about .5 to .75 MOA

    Tried the 200 AB's as well and they were the least accurate in my rifle of the 5 bullet types I tried. About 1 MAO.

    180 E-Tips were very good with fairly consistent sub .5 MOA groups.

    Best were Cutting Edge 180's (C32).

    Bergers can be quite sensitive to seating depth/jump. You might want to check out the Berger sticky in the Reloading forum....

    http://www.longrangehunting.com/for...accuracy-berger-vld-bullets-your-rifle-40204/

    Hope that helps

    P.S. It obviously didn't fit into the mag but I was able to put one down with tip just above mag box for second shot follow up.