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Thread: 300 win mag alternatives for A5744

  1. #1
    Boolit Mold
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    Mar 2021
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    300 win mag alternatives for A5744

    Looking for a substitute for A5744. 20-25 grains behind gc 174 grain CB is published. But, in this environment, looking to use powder I have on hand. Looking at burn charts, wondering if anyone has tried imr 4227 for similar loads in the 300 win mag.

    Thanks

  2. #2
    Boolit Master


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    Do you have access to Lyman Cast Bullet Manual #4?

  3. #3
    Boolit Master

    dannyd's Avatar
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    unique works good out to 200 yards for 168 rcbs sil bullet.

  4. #4
    Boolit Master
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    I use a lot of RE-7 in my 338 WM as an easier-to-find replacement for 5744.

  5. #5
    Boolit Buddy para45lda's Avatar
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    It will depend on what speed you're trying to get to. Some 4227 reduced loads may need/like filler. At higher levels it doesn't seem to be as position sensitive as some other powders.
    Shoot me a p.m. and I'll look at my old Lyman manual when I get home.

    YMMV

    Wes
    If you're gonna be dumb, you gotta be tough.
    SASS 17373
    Proud Dad of a USAF Airman

  6. #6
    Boolit Mold
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    Mar 2021
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    OK, I found an old Lyman book from when I started reloading in the late 60's, and it has loads for 4227. Thanks, I had not thought to go that far back in time.

    Also, had not thought of RL-7 as I thought it might be too far from 5744 on the burn chart.

    I also have the following powders:
    H110
    Vhit N110
    W-296
    IMR4227 and
    RL-7

    173 or 200 gas checked boolits

  7. #7
    Boolit Grand Master


    missionary5155's Avatar
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    We have never regretted having a good assortment of the old reloading manuals...... especially those that deal with lead slugs.
    "Come unto Me, all you who labor and are heavy burdened, and I will give you rest." Matthew 11:28
    Male Guanaco out in dry lakebed at 10,800 feet south of Arequipa.

  8. #8
    Super Moderator


    ShooterAZ's Avatar
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    A5744 is hard to beat in the 300 Win Mag. The lowly LEE C309-170F shoots like a house afire in my Ruger M77 MKII with that powder. The Lyman Cast Bullet Handbook #4 doesn't list any 300WM loads for IMR 4227, but it does have loads for RL7. Just as a point of reference with a 180 grain Cast Boolit (#311332), the Start load with RL 7 is 27.5 grains and Max is 46. You'll likely find the best accuracy on the lower end of the scale. Hope this helps.

  9. #9
    Boolit Grand Master
    rockrat's Avatar
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    Surprised someone hasn't mentioned Shooters World Buffalo Rifle powder

  10. #10
    Boolit Mold
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    Thanks all for your help and suggestions.
    Hopefully by the end of the year, we can once again find a full range of propellants.

    Cheers,

  11. #11
    Boolit Master



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    As rockrat has pointed out, truly a wonder no one has mentioned Buffalo Rifle powder. I believe it has been well documented that it is in fact Lovex D060 the very same as the very expensive 5744.

    https://shootersworldpowder.com/bulk-propellant/#burn
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check