Reduced Velocity 300 Win Mag Loads

Discussion in 'Reloading' started by aggie99, Oct 4, 2012.

  1. aggie99

    aggie99 Well-Known Member

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    I plan on loading some reduced loads for my brothers 300 win mag. I am aiming for 30-06 velocities with 165 bullets and have Retumbo, H4350, and H4831 available. Have any of you tried this and should I use magnum or standard primers.

    Thanks for any advice.
     
  2. silvertip44

    silvertip44 Well-Known Member

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    I am loading some reduced loads for mine. It is a 700 Milspec 5R with 26"barrel.
    The load is Winchester brass, Federal 215 primer, and 180 gr. Accubond with 65 grs. H4831. This is a very accurate load in my rifle, but haven't chronoed it.
    I will use it for hunting whitetails here in Georgia.
     

  3. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    We've used win 760 with slightly reduced loads in the 300 with 165's with good results, I see no reason why start loads of 4350 or 4831 won't work well too. I'd keep the bullet weight up; I fooled around with lighter loads with 125's this spring in my 300 win(had them around and wanted holes in paper) and I got partly collapsed cases and poor accuracy with 4895 and 4320. I went with slower powder(rl19) and it was fine with 125's.
     
  4. aggie99

    aggie99 Well-Known Member

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    Thanks for the information. The rifle is a Thompson Center Encore which is primarily used for whitetails at close range. The amount of meat damage is dramatic to say the least so we hope to find an accurate, mild load to help reduce the amount of loss. Has anyone experimented with magnum vs. standard primers?
     
  5. Edd

    Edd Well-Known Member

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    Using the wrong powder in reduced quantities can be dangerous. Hodgdon recommends H4895 because it ignites evenly in reduced loads. You can reduce their H4895 maximum recommended loads by 40%.
     
  6. aggie99

    aggie99 Well-Known Member

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    I understand that. I plan on using the listed starting loads for the powders listed above. Has anyone tried Retumbo for the 165gr bullets in 300 mag? Its not listed by Hodgdon until you get to 200+ grain bullets.
     
  7. Edd

    Edd Well-Known Member

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    I don't think you understand.

    You shouldn't use the powders listed above.

    You should use H4895 powder and listed maximum loads for H4895 as a baseline.
     
  8. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    not in cold temps it can't. That's one of the powders that I had trouble with.
     
  9. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    4895 sucks in a 300 win. It is good for 308 and 30-06 cases with normal or reduced loads but doesn't even have enough fill at full pressures, so why would you want to risk a squib or flash over with a half full case. Use a start load of 4350 or 760 and you'll hit 3K with a 165 at about 50KPSI, just make sure to use a mag. primer. It'll be safe to below zero temps. too, witch will not be true of 4895 or faster.
     
  10. Edd

    Edd Well-Known Member

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    I'm surprised Hodgdon knows less about their powder than you.
     
  11. highridge1

    highridge1 Well-Known Member

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    Best results I have had is with RL25
     
  12. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    Both of you are southern. It doesn't matter squat to either of you if it squibs in cold weather. Hodgdon shotshell powders like hs6 are very prone to squibbing in cold temps. too. I've had to knock more than one wad out of my barrel from their crap powders. If I'm shooting a load in sub freezing weather it WILL have greater than 80% load density. If you want I'll send you a few of my ruined 300 win cases to enjoy.
     
  13. aggie99

    aggie99 Well-Known Member

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    H4350 and H4831 are both listed in the Hodgdon data for 165gr bullets. I plan on using their starting loads and working up if necessary without going full bore. Are you saying this would be unsafe?
     
  14. Edd

    Edd Well-Known Member

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    No, that wouldn't be unsafe. It also isn't a reduced load.