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Old December 22, 2009, 19:27   #1
8654-1ea.
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7.62x39 Subsonic Loads

Anyone have a good subsonic load?

Would like to know:
Bullet Wt.
Powder
Charge Wt.
Primer

Barrel Length and Gas System Length would be plus.

Thanks!
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Old December 23, 2009, 00:17   #2
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Have you tried over at Quarterbore?
here




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Old December 23, 2009, 01:36   #3
Tim Dreas
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I did some work on subsonic 7.62x39. I found to get consistent results I had to use Remington small rifle primer brass. Due to the fact that Remington only makes this brass in limited runs I haven't run many tests. Large rifle primers were more difficult to get consistent results. I used bullets that weighed around 200 grains (some slightly less). If I get enough Remington brass I'll look up what powders I have tried in the past. For large rifle primers the closest thing to "best" might be Remington primers. I sort of gave up on the project and don't remember which powders worked best.
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Old December 23, 2009, 11:45   #4
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http://members.shaw.ca/cronhelm/DevelopSubsonic.html

I'm looking into a Remington 799 for this exact purpose - maybe sometime next year though.
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Old December 23, 2009, 17:28   #5
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Another subsonic report is here:

http://guns.connect.fi/gow/arcane1.html

I have enjoyed my reduced charge 7.62X51 loads very much but they hover just over 1200fps, so plenty of sonic noise. I am saving some of that RP X39 brass for the next stage of development. I am thinking of the 180-200gr bullet loaded tail forward or same wieight cast lead in the X39 case with the appropriate powder charge to get it down range around 1000fps.

Edit to add:
Here is a post on Quarter bore from Court in FL:

I just wanted to say I have been making 7.62X39 subsonic ammo for a few years useing Winchester brass and the Sierra 180 grain .311 Spitzer bullet, it's made for the .303 Brit but works well for 7.62X39.

I found Reloader 7 and Winchester 748 gave me the best accuracy and would still cycle the action of my Colt AR in 7.62X39.

Thank you,

Court in FL.
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Old December 23, 2009, 17:38   #6
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I wonder what 5 grains of Unique pushing a #1 buckshot ball would do?
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Old December 23, 2009, 18:16   #7
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I was tempted to try the buckshot with my unique loads in x51 but stuck to the 100gn m1carbine bullets. I'll have to reconsider buckshot in the x39.
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Old December 23, 2009, 20:05   #8
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Just playing around one day. For an AK, I loaded 16.5gr of AA2200 behind a Ulyanovsk 124gr 8M3 HP bullet in a barnaul steel case. Primer was a Murom LR Berdan primer. I got complete ejection and rechambering of the next round from 5rds loaded in a 30rd mag. Velocity was 1017fps.

I did this with a 124gr bullet just to see if I could and I didn't do any reliability or accuracy testing. I just made it go bang and cycle a few times to earn my beer at the end of the day. You will have a much easier project if you use a heavier bullet.

I have some 200gr .308 bullets here. They look like some type of custom or match bullet. I might try those sometime if I can get more of them to make it worth working up the load for.

Lots of guys use .303 Brit bullets and 7.62X54R bullets to do this. Those should be good test bullets.
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Old December 24, 2009, 02:59   #9
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Quote:
Originally posted by daschnoz
http://members.shaw.ca/cronhelm/DevelopSubsonic.html

I'm looking into a Remington 799 for this exact purpose - maybe sometime next year though.
I have the Remington 799. I was looking for the Charles Daly version and I have found one unused and I can buy it after New Years. They are both in Serbia. It's a better choice than the CZ-527 in 7.62x39 which has a couple of problems. First problem with the CZ is the chamber is oversized with too long headspace. This requires removing the barrel, cutting the shoulder back and reaming the chamber. CZ-USA won't pay fot this. The other problem is the firing pin anf firing pin spring are made for 22 Hornet. CZ-USA admits this much and will give a stronger firing pin spring. They claim the headspace issue is a CIP vs SAAMI difference but it's an issue with all ammo and even worse with full length sized handloads. The Remington 799 is free of all of these issues. Some people prefer the stock on the Charles Daly version but the action is the same as the Remington 799.
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Old December 25, 2009, 14:08   #10
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I use trail boss in a bolt action.
I use 8 grains of trail boss with a 230 grain cast lead bullet
better start with 7 grains and work up to 8
dont use this load in standard brass only use it in small primer brass.

I am always looking for small primer brass.. look at my signature

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see the rifle here
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Old December 26, 2009, 08:01   #11
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Quote:
Originally posted by ActionYobbo


I am always looking for small primer brass.. look at my signature

I will have to look and see what I have. I sold a bunch of it last year.
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