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Thread: What Powder is best for 7.62x39 to run in a Yugo SKS?

  1. #1
    Boolit Buddy


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    What Powder is best for 7.62x39 to run in a Yugo SKS?

    I'm looking for a good powder choice for 7.62x39 to run in a Yugo SKS.I have a ton of 125gr FMJ to load up and I had some IMR4227 without a use and there was load data available so I gave it a go. It shot, but wasn't enough umpfh to cycle the bolt and chamber the next round. It was occasionally enough to almost eject a case. (in case anyone is wondering, factory rounds do cycle just fine, and the rifle and gas system are in good shape)

    Without going out and buying a bunch of different powders in hopes of hitting on one that works, I was hoping someone here has used a powder with published load data that will get me going in the right direction.

    Thanks!
    Last edited by Jake McCracken; 06-01-2018 at 06:42 PM.
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  2. #2
    Boolit Master Mauser 98K's Avatar
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    i use H322 myself.. it functions my SKS with my 130gr loads without any problems..

  3. #3
    Boolit Master
    Mr Peabody's Avatar
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    AA1680 did just fine for me

  4. #4
    Boolit Master GhostHawk's Avatar
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    I use large for caliber cast lead, .312 185 gr Gas check. And a reduced load of IMR 4895. My thinking was I increased bullet weight by roughly a third, so I reduced load by a third and tested.

    This shoots exactly to the sights on my Yugo SKS at 50 yards, is more accurate than Tulammo.

    The other powder I would consider is 3031.

    I do shoot some low end Red Dot loads but for those I turn the gas off and use it as a straight pull bolt.
    Red Dot won't cycle the action. Pressures get too high to be safe before you get reliable action.

  5. #5
    Boolit Master RogerDat's Avatar
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    Anyone ever use Varget in SKS? Cycles a mini-14 well and I believe I have seen load data for it in SKS.
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    Scrap.... because all the really pithy and emphatic four letter words were taken and we had to describe this way of getting casting material somehow.
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  6. #6
    Boolit Buddy


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    Quote Originally Posted by GhostHawk View Post

    The other powder I would consider is 3031.

    I hate to assume, so is the 3031 IMR also? I have load data for IMR 4895 I wrote down a few years back in my book, but I have no Idea where I got it from.

    I should have mentioned I'm shooting 125 FMJ. But I will look at the load data for the above mentioned powders and see what I can use in other calibers I shoot too. Hopefully one of them will cover multiple cartridges in case they don't work out in the SKS.
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  7. #7
    Boolit Master
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    I use CFE-BLK for 123 FMJ. 2400 for lead. Plenty of threads here on forum.

  8. #8
    Boolit Master GhostHawk's Avatar
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    Yes my bottle and data was for IMR 3031.

  9. #9
    Boolit Master


    Larry Gibson's Avatar
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    4227 is my preferred powder for milsurp duplication 7.62x39 loads. Try. 22.5 gr under your 125 fmj bullets. I have pressure tested that load and it falls under milsurp pressures.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
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  10. #10
    Boolit Master
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    Quote Originally Posted by Larry Gibson View Post
    4227 is my preferred powder for milsurp duplication 7.62x39 loads. Try. 22.5 gr under your 125 fmj bullets. I have pressure tested that load and it falls under milsurp pressures.
    Thanks for the information. I'm assuming you've function tested this load in AK or AK clones as well as the SKS.
    I've used 4227 in reduced 7.92X57 loads for a short barreled Persian Mauser carbine and a friend has used it for .303 loads for the No.5 carbine. Good velocity in short barrels with mild muzzle blast.

    My AK clone was inherited, I've only fired it a few times before it was left to me by a relative. Haven't tried loading for it yet. I have a few Remington rounds and spent cases to experiment with.

    I'm not much interested in the AK or similar rifles so I may never get around to doing much with it.

  11. #11
    Boolit Master






    Lloyd Smale's Avatar
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    1680 is THE powder for 762x39
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  12. #12
    Boolit Master Reverend Al's Avatar
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    Yep, AA1680 was designed for the 7.62x39mm and it works great for me. I found some at a decent price and stocked up on it so I'm good for years to come ...
    I may have passed my "Best Before" date, but I haven't reached my "Expiry" date!

  13. #13
    Boolit Master
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    If you are looking for 'factory spec' loads with 125 jacketed - AA1680.

  14. #14
    Boolit Buddy


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    Quote Originally Posted by MostlyLeverGuns View Post
    If you are looking for 'factory spec' loads with 125 jacketed - AA1680.
    Just looking for a load that cycles the action reliably.

    Thanks everyone for the input!

    Sent from my SM-G960U using Tapatalk
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  15. #15
    Boolit Man
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    while 1680 is the powder made for the 7.62x39 round, 4198 works just about as well.

  16. #16
    Boolit Master
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    Quote Originally Posted by pakmc View Post
    while 1680 is the powder made for the 7.62x39 round, 4198 works just about as well.
    3031 seems to work well for me

  17. #17
    Boolit Master
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    4198 or 335 h110 for cast wouldnt cycle 123 fmjs

  18. #18
    Boolit Master
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    GONRA sez look for "680" and varients listed above. U.S.& A. military powder for this callber!

  19. #19
    Boolit Master
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    Quote Originally Posted by Jake McCracken View Post
    I'm looking for a good powder choice for 7.62x39 to run in a Yugo SKS.I have a ton of 125gr FMJ to load up and I had some IMR4227 without a use and there was load data available so I gave it a go. It shot, but wasn't enough umpfh to cycle the bolt and chamber the next round. It was occasionally enough to almost eject a case. (in case anyone is wondering, factory rounds do cycle just fine, and the rifle and gas system are in good shape)

    Without going out and buying a bunch of different powders in hopes of hitting on one that works, I was hoping someone here has used a powder with published load data that will get me going in the right direction.

    Thanks!
    I use 3031 and have modified my gas system to be less violent .

    http://castboolits.gunloads.com/show...as-System-Mods

    Last edited by Retumbo; 06-13-2018 at 05:51 PM.

  20. #20
    Boolit Buddy
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    Anyone loading for the SKS with 2400?

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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