What is the best 300 win Mag powder

Discussion in 'Reloading' started by tanka, Oct 10, 2013.

  1. tanka

    tanka New Member

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    I'm new to reloading 300 Win and I'm stuck between RL 22, IMR 4350 and H4831. What powder is good for the 180 gr bullets. I have read that standard primers work better for the 300 win. I will work the load up, just need opinions on powder choice. Its a 24inch barrel on rem 700 action.
     
  2. BountyHunter

    BountyHunter Writers Guild

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    4831sc
     

  3. Bart B

    Bart B Well-Known Member

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    IMR4350 and a few others of that speed has produced the best accuracy with 180's through 200's in competition with the .300 Win Mag.

    Several slower powders shoot those bullets out faster with the same peak pressure, but they may not all land on target too close together.
     
  4. Broz

    Broz Well-Known Member

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    H-1000 has been very good to me. But I load mostly 210 to 230 gr bullets in the 300 wins. That said it is also very accurate with great velocity in the 7mm/300 wins with 180's.

    Jeff
     
  5. Derek M.

    Derek M. Well-Known Member

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    I have used ALL of these with equal success with varying 180 bullets from Nosler, Swift, Hornady, Speer, etc.:

    H1000
    Re22
    IMR4831
    IMR4350
    H4831SC
    VV N560

    For me it was a toss up between Re22 and H1000. I owned 2 different 300 WMs and together, killed more game with loads using Re22. Just got best velocity and accuracy year after year.
     
  6. johnnyk

    johnnyk Well-Known Member

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    I get sub 1/2" from 180gn SMK's and a max load of RL22 and 9.5M primers. I use the same powder charge but swap out primers with CCI BR2's when using 180gn Ballistic Tips. When loading the 185gn VLD and the 190 SMK, I use H1000 w/CCI 250's and accuracy is unbelievable! Good shooting! JohnnyK.
     
  7. Spuds

    Spuds Well-Known Member

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    +1 for H1000 and CCI 250. Very accurate in my rifles with both 185 Berger and 180 Scirocco.
     
  8. Firearrow

    Firearrow Well-Known Member

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    My old barrel liked 4831sc over h1000. But h1000 did provide a bit more speed.
     
  9. Marble

    Marble Well-Known Member

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    Mine likes H4350 and 180 accubonds. RL22 wouldnt do it in mine.
     
  10. txjohn

    txjohn New Member

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    Have not had any luck with H-1000 but have excellent results with IMR-7828
     
  11. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    165 to 200 grain- rl22
    180 to 220 grain- 7828 or h1000
    newer h4831 blows chuncks compared to war surp stuff imo; I've shot both and there isn't really any reason the new stuff should be so slow as the pressure comes up the same; the last time I tried both in the same rifle ( a 300win remmy with 180's) new manufacture h4831 was over 100 fps slower with equal or higher pressures.

    As to primers, you can get by just fine with most stick powders on standard primers in a 300win unless you are shooting in cold (sub freezing) weather. I use 215's in my 300win, 7stw, and 300 rum; my other larger cal's get a mag primer but not always a 215; I'll shoot in some darn cold temps. though.
     
  12. txjohn

    txjohn New Member

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    Lyman's #49 calls for Win. LR primers for the 300 win. so you can use standard LR primers. I have had good luck with the 4350's with 165's-180's and R-22 and IMR 7828 for 180-200's.