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Reloading 7.62x39
Montanapete1
Member Posts: 27 ✭✭
Is there any real need for this or should i start doing this, if I should, should i get a progressive press, i have a single stage now, but that seems to slow when i own an sks?
Comments
select "rifle"
select "7.62x39 russian"
Have you tried any of those loads? Thanks for the link. Pete
I only reloaded the x39 for a friend that had a very strong bolt action gun. We tried to push the velocity up quite a bit with the 125 gr bullets.
If you are using them in a semi-auto like a ak or sks, just about any of the mid to high end loads will work, BUT each gun is different. Work from the low end up, if you want to hotrod that cartridge.
In a sks/ak, velocity and accuracy takes a second place to function and clean burning loads.
just reloaded a bunch of 7.62x39 for SKS. IMR 4227 28.5 grs, worked great.[;)]
Just sized them last night, I'll give this a try thanks. What size bullet did you use?
The highest load of 4227 I've seen listed anywhere on reloading sites is about 26 grains.
IF you are loading for a sks/ak the saving factor is the long free bore the para=military guns have.
I hope the other posters don't take this the wrong way, BUT why would
you START with a load posted here that is way over any listed in reloading charts.
BE CAREFUL.
read ALL of this...
http://www.ar15.com/archive/topic.html?b=6&f=42&t=256397
you know what they say about load data from other folks,...always start low and work up looking for pressure indications. Rule of thumb......
+1000
I will never list my loads on a forum. That's just the way I am.
I am not standing next to you while you copy my loads.
The 7.62 x 39 is among the most "dangerous" reload out there.
I've seen "reloaders" work up hot loads with .308" bullets and then switch to .311". After explaining the potential pressure change, some still say, " but it was alright with the last batch".[:0][:0]
The 7.62 x 39 is among the most "dangerous" reload out there.
Why do you say this? Is it the bullet size or the cartridge itself? Is this why finding Printed load data is harder? Thanks Pete
And there is little info in books and charts for a round that is fired so much. Probably because mil. ammo from over seas is {was} so cheap.
The two things you noted. I've seen too many people use .308" bullets to reload the x39, which in it self is not dangerous, TILL you use .311" tips which will raise the pressures with the same load.
And there is little info in books and charts for a round that is fired so much. Probably because mil. ammo from over seas is {was} so cheap.
Maybe maybe not.
Sierra has quite a bit of data for the 7.62x39. They have data for .308 bullet and for .311 bullets.
Here is an example of some of their data.
125gr SPT .308.................125gr SPT .311
Powder, Max charge.............Powder, Max charge
N-120, 24.4gr.................N-120, 25.0gr
IMR 4227, 23gr................IMR 4227, 23gr
N-130, 27.1gr.................N-130, 27.5gr
AA-1680, 24.7gr...............AA-1680, 24.6gr
H4198, 25.4gr.................H4198, 26.1gr
AA-2015, 28.2gr...............AA-2015, 28.9gr
R-7, 26.3gr...................R-7, 27gr
Benchmark, 29.4gr.............Benchmark, 30.0gr
H322, 28.8gr..................H322, 29gr
I know this is only one source of data, but according to Sierra, starting out with a .308 bullet and switching over to a .311 bullet will reduce pressure, not increase it. Go figure.
Anyhow, it's best to avoid all of these issues by following safe reloading practices and that is,
Anytime you change a component you should drop the charge down and work back up. Those that don't could make loading any cartridge "dangerous" not just the x39 with it's different bullet diameters.
By the fact that the loads are heavier than the .308 tips??
Do you have any pressure reading on those loads??
Could it be that more powder is needed to push the fatter bullet down the bore, and sometimes a heavy powder load with a undersize tip will lead to fouling which increases pressures again??
Please post more info.
As Sierra does not list actual pressures we can only assume that all their loads were tested to run at the same or similar MAP. I know Assume makes an * of You and Me, sorry.
If this assumption is correct then the .311 diameter bullet was able to utilize more powder producing higher velocity and still stay within the "Safe" pressure ranges of the x39.
How ever you want to slice it, according to Sierra, switching from a .308 to a .311 will not cause a "dangerous" situation as posted earlier.
As you can see my this computer generated data the .311 bullet does produce higher pressure than the .308 bullet. But the pressure is minimal at about 2000psi. certainly not enough to turn a safe load into a "dangerous" load.
Cartridge : 7.62 x 39 (M43) Russ. Bullet : .311, 125, Speer SP 2213 Cartridge O.A.L. L6: 2.150 inch or 54.61 mm Barrel Length : 24.0 inch or 609.6 mm Predicted Data for Indicated Charges of the Following Powders. Matching Maximum Pressure: 50000 psi, or 344 MPa or a maximum loading ratio or filling of 110 % These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window. C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand that all of the listed powders can be unsuitable for the given combination of cartridge, bullet and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations. USE ONLY FOR COMPARISON ! 74 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped. Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time % Grains Gramm fps % psi psi ms --------------------------------- ----------------------------------------------------------------- SF-033 fl 107.5 31.8 2.06 2699 100.0 50000 4474 1.118 ! Near Maximum ! Nitrochemie A/S 0300 102.7 30.5 1.98 2687 98.8 50000 4648 1.117 ! Near Maximum ! Alliant Reloder-10x 109.1 29.8 1.93 2649 98.8 50000 4504 1.135 ! Near Maximum ! Norma 200 99.4 29.8 1.93 2640 99.3 50000 4424 1.151 ! Near Maximum ! Bofors RP1/NP ~approximation 99.4 29.8 1.93 2640 99.3 50000 4424 1.151 ! Near Maximum ! Ramshot X-Terminator 102.5 31.8 2.06 2636 95.7 50000 4614 1.132 ! Near Maximum ! SNPE Vectan SP 10 104.6 32.4 2.10 2636 94.6 50000 4660 1.132 ! Near Maximum ! PB Clermont PCL 508 104.5 32.4 2.10 2634 94.5 50000 4652 1.132 ! Near Maximum ! ADI AR 2219 104.3 31.2 2.02 2634 95.7 50000 4600 1.127 ! Near Maximum ! Winchester 748 110.0 34.3 2.22 2629 91.6 50000 4763 1.130 ! Near Maximum ! Hodgdon H335 104.7 33.1 2.14 2629 94.4 50000 4667 1.131 ! Near Maximum ! ADI AR 2207 102.7 27.8 1.80 2629 100.0 50000 4148 1.134 ! Near Maximum ! SNPE Vectan Sp 7 108.3 33.6 2.18 2619 92.6 50000 4629 1.145 ! Near Maximum ! Somchem S321 109.9 34.3 2.22 2618 91.4 50000 4706 1.137 ! Near Maximum ! Hodgdon H322 110.0 30.9 2.00 2610 95.3 48459 4566 1.141 ! Near Maximum ! Ramshot TAC 108.6 33.7 2.18 2610 91.0 50000 4649 1.137 ! Near Maximum ! Accurate 2460 109.4 34.0 2.20 2606 92.4 50000 4560 1.148 ! Near Maximum ! Lovex-D0832 109.8 33.5 2.17 2601 95.3 50000 4463 1.132 ! Near Maximum ! Accurate 2015 110.0 30.8 2.00 2601 97.8 48226 4400 1.158 ! Near Maximum ! Alliant Reloder-12 110.0 32.5 2.10 2596 95.6 49702 4449 1.139 ! Near Maximum ! IMR 4198 106.4 27.6 1.79 2596 99.3 50000 4134 1.130 ! Near Maximum ! Vihtavuori N530 110.0 32.0 2.08 2592 90.8 49229 4579 1.144 ! Near Maximum ! Accurate 2230 106.9 33.2 2.15 2586 92.2 50000 4456 1.148 ! Near Maximum ! Alliant Reloder- 7 100.9 28.3 1.83 2585 99.1 50000 4180 1.152 ! Near Maximum ! Vihtavuori N120 105.2 27.8 1.80 2584 100.0 50000 3826 1.140 ! Near Maximum ! PB Clermont PCL 507 110.0 33.2 2.15 2568 90.0 47369 4578 1.162 ! Near Maximum ! Kazan Sunar 308W 105.1 29.8 1.93 2564 98.2 50000 4147 1.152 ! Near Maximum ! ADI AR 2210 104.0 31.1 2.01 2564 92.1 50000 4378 1.150 ! Near Maximum ! Vihtavuori N130 110.0 29.8 1.93 2563 98.3 48955 4169 1.156 ! Near Maximum ! Accurate 2200 100.7 29.6 1.92 2561 93.5 50000 4304 1.149 ! Near Maximum ! Hodgdon H4227 96.0 25.5 1.65 2560 100.0 50000 3852 1.140 ! Near Maximum ! Norma 201 110.0 32.6 2.11 2553 90.2 46892 4537 1.181 ! Near Maximum ! ADI BM2 101.4 31.3 2.03 2552 92.1 50000 4324 1.154 ! Near Maximum ! Lovex-D0733 104.8 32.3 2.10 2550 91.0 50000 4301 1.152 ! Near Maximum ! Hodgdon Benchmark 110.0 31.4 2.03 2546 91.8 49730 4312 1.157 ! Near Maximum ! Hodgdon BL-C2 110.0 34.8 2.25 2544 88.4 44582 4697 1.187 ! Near Maximum ! Lovex-D0731 104.6 32.3 2.09 2539 90.0 50000 4266 1.153 ! Near Maximum ! IMR 4227 94.7 25.1 1.63 2536 99.8 50000 3815 1.146 ! Near Maximum ! Lovex-S0531 96.8 25.1 1.63 2534 100.0 50000 3632 1.155 ! Near Maximum ! Hodgdon H4198 101.4 27.6 1.79 2528 95.3 50000 4034 1.152 ! Near Maximum ! Rottweil R901 110.0 30.3 1.96 2495 92.4 42571 4423 1.241 ADI AR 2206H 110.0 31.9 2.06 2495 88.7 49414 4138 1.169 ! Near Maximum ! Somchem S341 110.0 34.3 2.22 2477 85.8 45165 4297 1.197 ! Near Maximum ! Vihtavuori N110 90.9 22.3 1.45 2476 100.0 50000 3267 1.169 ! Near Maximum ! ADI AR 2206 110.0 31.5 2.04 2475 88.5 47352 4134 1.187 ! Near Maximum ! Norma 202 110.0 31.3 2.03 2475 91.6 40284 4426 1.236 Somchem S265 92.2 24.5 1.59 2470 100.0 50000 3434 1.178 ! Near Maximum ! Lovex-S0601 110.0 31.0 2.01 2458 87.3 45903 4127 1.202 ! Near Maximum !