300 rum loads

Discussion in 'Reloading' started by jimbothepunk, May 20, 2010.

  1. jimbothepunk

    jimbothepunk Well-Known Member

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    May 17, 2010
    so what kinda loads are ppl using ive got a couple of more rounds in basic form and considering changing if some has better luck im runnin a sendero with a muzzle brake and apart frm that its standard


    thanks

    lucas
     
  2. freebird63

    freebird63 Well-Known Member

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    Dec 20, 2009
    Are you a reloader??
    I have been doing a ton of load development for my sendero 300RUM. So far I really like the 210gr bergers with retumbo powder and federal 215 primers.
    I have played around with 180gr scirrocco's, 175gr bergers, 185gr bergers, 190gr bergers, 210gr bergers, 208gr A-Max. Powders as follows, retumbo, ramshot magnum, RE22, RE25, US869, Magpro, H1000. You also need to think about experimenting with your bullet seating depths. I was thinking about also trying some 240gr SMK's. Am getting ready to do some modifications to my gun, going to install a wyatt extended box magazine, either jewell or timney trigger and last a nightforce rail and rings. Am heading out in the morning for some more shooting, the Idaho weather has been very unpredictable. Shoot me a PM with more questions.
    Chuck
     

  3. cavtrooper94

    cavtrooper94 Well-Known Member

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    subscribed
     
  4. jimbothepunk

    jimbothepunk Well-Known Member

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    yeh i reload im runnin 180 interbond in remmington brass backed up with 100.5grns of 2225 and winchester primersi get sub moas but think i can do better. my seating depth is bang on the mag length
     
  5. VSSF

    VSSF Well-Known Member

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    180gr. Swift Scirrocco over 98gr. of Retumbo.
     
  6. rugerdog5

    rugerdog5 Well-Known Member

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    I'm using 90.0 grains retumbo with a 200 grn smk and rem mag primers out of my 700 pss. Velocity is 3065 with very low sd.
     
  7. jimbothepunk

    jimbothepunk Well-Known Member

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    whats this retumbo im hearing about
     
  8. rugerdog5

    rugerdog5 Well-Known Member

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    It's a hodgdon powder one of the slower burning powders
     
  9. stress-relief

    stress-relief Member

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    I acquired some 175 grain Berger VLD hunting bullets (freebees). I thought I would play with them in my 300 RUM. Does anyone have a good load for this particular bullet that I can use as a starting point? I want to use Retumbo powder. I would start at a lower powder charge and work my way up.
    Thanks
     
  10. ShortMag3

    ShortMag3 Well-Known Member

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    Just finished developing a 200gr Accubond load and ended up with 88.5 grains of Reloader 25 and Winchester LRM primers. 3110 fps and exceptional accuracy. Sub MOA at 500 yards, two four shot groups.
    Sako action, Christensen/Shillen barrel, muzzel brake
     
  11. walter351

    walter351 Well-Known Member

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    Sep 16, 2008
    I always had the best luck with RL-25. I think that my best load was rl-25 94.5 gr with a 180 accubond.
     
  12. skma

    skma Member

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    Nov 10, 2009
    rl-25 94.0grs fed 215 primer 168 gr barnes tsx at 3368fps, 88.0 grs with the 180 gr tsx same powder at 3148+ fps, havent tried any other powder. RL-25 produces quarter sized holes in my stock xcr remy 700:)
     
  13. SomeRumbum

    SomeRumbum Well-Known Member

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    Jan 7, 2010
    96.0 grains of RE 25, 180 Nosler Accubond, Fed 215 primers. Great results in multiple 300 rums.
     
  14. .308 Fanatic

    .308 Fanatic New Member

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    May 19, 2010
    I too just bought .300 ultra sendero, I am having good results with 208 A-MAX and 210 Bergers both 90 grs. retumbo rem 9 1/2 primers. Both loads around 3/4 of an inch at 300 yds.