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Thread: Loading the 7.62x39 with other bullets?

  1. #1
    Gunco Regular Gunter's Avatar
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    Default Loading the 7.62x39 with other bullets?

    I didn't want to highjack HC's thread on the 9x39, but Muttman brought up a question that I have been wondering about also. How do you come up with a starting load when changing bullets and powders? There isn't jack on the 9x39 and there is some on the 7.62x39. The info that 1biggun posted in the other thread has a lot of info but only uses 2 powders in the 7.62. I have 3031 and 4064 on hand for the 308 and 30-06, so I would prefer to use that powder. The Lyman manual shows most of the loads for the 123gr using the faster burning powders, but there is one load using H-335 (30.5 starting and 34.5 max which is a compressed load). Looking at the burn rate chart H335 is almost the same as 3031, so would it be safe to start with 30.5 grains of 3031 for the standard 123gr?

    Edit to add never mind on the 3031. A 7.62 case can only hold 22gr of 3031 without being a compressed load. 30gr wouldn't even fit in the case.

    I'm also going to try some subsonic loads just for s&g. There is some info out there on those loads.
    http://members.shaw.ca/cronhelm/762ProjectRifle.html
    http://members.shaw.ca/cronhelm/762Page.html
    http://members.shaw.ca/cronhelm/DevelopSubsonic.html

    May have to register to view these:
    http://www.silencertalk.com/forum/vi...c27a5b05eb47f0

    http://www.silencertalk.com/forum/viewtopic.php?t=10995
    Last edited by Gunter; 11-16-2007 at 02:31 PM.

  2. #2
    No Hope For Me 1biggun's Avatar
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    If I didnt have a computer I would find a simular round that shoots a simular weight bullet and start with the lowest load minus 10-20% and work up there. keeping in mind that a light load can be dangerous as well. I have been checking into some of the load from a disk programs were you plug in all the info and it gives you a recomended load if I get any more serious about reloading it may be the next thing I get.. in the case of the 9mmx54R wild cat there are already loads for 200 grain cast lead bulets for the 7.62x54R I would start there and work up untill primers start to flaten out and back off. my book shows a load of 20 grains of IMR4227 will push a cast 200 grain bullet at 1537 FPS this is a very light load and would likely make a good starting point that case will hold at least 52 grains of powder. I DONT KNOW ANY THING AND DO NOT TAKE MY LOADS AS FACT!!! NO ONE SHOULD USE ANY OF MY LOADS EVER!!!. If I am giving load info it is usualy out of a book and I indicate were I got it from that I will be happy to do.
    Hc's loadis going to lose a fair amount of capacity with the 250 graion bullet in a standard length mag. grains of water capacity for 7.62x39 is33.98gr the 44 rem mag is 33.94 nearly identical I suspect that the loads would be pretty close. the loads for the 44 long colt might be usable as well depending on the actuall case capacity. there is also a .375 shannon that is very simular to what HC is building it has a case capacity of 32.76 it shoot a 200 grain bullet by using 22GR of 2400 powder. Im gussing that a 9x39 would be close to that (GUESSING!!)

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    Happy Camper hcpookie's Avatar
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    My dad - who has reloaded longer than I've been alive - and I had a long talk about this just the other day. Obviously, I don't want to go to all this work and suffer a mechanical blowout (or worse) with too hot a load.

    He goes to his reloading manuals and compares similar sized cartridges for a starting range, and always works up. He normally works up to the hottest load possible because he likes his rifles to kill on one end and cripple on the other

    We compared some calibers that had large bullets and small powder charges. Things like the 454 Casull, other 357 calibers etc. That gave us both a ballpark estimate on the starting loads. And everything was very close in his books to what is published in that magazine article.

    I'll be putting the first few rounds through a chrono so I can instantly verify the velocity. I need to determine at what velocity 2400 should push my 250-grain bullets. I'm pretty certain that I can get a close estimate from reading the published reloading data from the powder mfr.

    Another thing that you didn't mention is the needs of barrel twist. Namely, I need a fast twist for such a heavy, slow bullet on my 9x39 clone. Again, cross-referenced with other "pistol" sized calibers and platforms like the T/C.

    The guy that did the 35x39 load from that magazine article I scanned said in the article that he used the RCBS .LOAD softare to compute the starting points. He discovered the original powder he used (355 I think?) was too hot. I assume he meant the velocity was too high, or it kicked too hard, but I don't know for certain.

    I'll be following Mr. Mason's 1993 example and use 2400, which is a slower magnum pistol powder. My dad thinks that is probably the best for what I need, even if the capacity is a little higher than his version.






    My dad knows a bit about wildcats - he has a necked-down .44 magnum cartridge called the 357-44 Bane & Davis (I think) which is named after the wildcatters who made it. It is his favorite wheel gun round and I think he's going hunting with it this year. I'll try to see if he can snap some pics and give me some info about it, because I have no idea what he did to work up a load for the necked-down .44 mag.

  4. #4
    Gunco Regular Gunter's Avatar
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    The 48th Lyman shows a load for the 7.62x39 using IMR4227 powder for the 123gr at 20.0 start and 22.0 max. Knowing that the case capacity is almost the same as the 44 magnum the Lyman shows IMR4227 for the 180gr at 24.2 starting and 27.0 max. This goes against the heavier bullet=less powder rule for reloading which is why I asked.

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    NoWorkCamp4Me railbuggy's Avatar
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    Keep it going guys. Im wanting to reload 7.62x39 with Bullseye as I use it on 45acp.Cant find canverstion charts.Not enuf info on reloading this round yet.Soon thou as prices keep climbing.I AM WATCHING.
    SOON-We already lost the war. You are the resistance.

  6. #6
    No Hope For Me 1biggun's Avatar
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    My dad knows a bit about wildcats - he has a necked-down .44 magnum cartridge called the 357-44 Bane & Davis
    strangely enough I was looking at that round today when thinking about starting loads. I was thinking it would make a good autoloader round if it was rebated.
    I just read the 35x39 artical on your sight very interesting. I disagree with the larger bore causing more bolt thrust and they had the CUP pressure for the 7.62x39 wrong (I think). I was suprised at the higer than expected velocitys with the 15o &180 grain bullets as well. is the 35x39 reamer the same as the one you bought?? this would make a pretty simple rebarrel.

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    No Hope For Me 1biggun's Avatar
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    I know that reloading for my AMDS 65 pistol made a huge differance in accuracy. I hope to try it on live game tommorrow morning

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    Gunco Member ammoboy2's Avatar
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    railbuggy

    I would personlly not consider Bullseye for use in the 7.62x39 for any standard bullet or load. The only possibility would be for a light cast bullet and that is a very slim maybe. Bullseye is one of the fastest powders and generates high pressure very rapidly. That is a recipe for booms on the wrong end of the rifle.

    I have had the best luck with AA1680 in the 7.62x39.

  9. #9
    Gunco Regular Gunter's Avatar
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    While picking up some reloading stuff I noticed that they had a Loadbook USA on the 7.62x39. It has a lot of loads with .308 and .311 from 100gr plinkers to 150gr.

    So I have some standard Speer 123gr .310 soft points, Speer 150gr spitzer .311 soft points, Hornady 174gr .3105 FMJ BT, and some 110gr V-Max .308 just to try. Testing will start in a week or two.

  10. #10
    No Hope For Me 1biggun's Avatar
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    there was some .311 vmax bullets avaliable. from one of the vendors in shotgun news. I think it was a limited run. I want a something more like the A max for deer however.

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