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Ammo and Reloading Factory Ammunition, Reloading, Components, Load Data and more.

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  #1  
Old 11-01-2019, 8:19 AM
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skyline skyline is offline
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Default 762x39 question for the pros

Good morning everyone this is going to be a long one
So my story starts with me loading 762x39 for the first time and I ran into a problem I couldn't get the nick to expand to except the bullet after bending the primer pin I found out that there were to sizes to. 762x39
311 and 308 so what I was doing wrong was trying to put a 311 bullet into a 308 brass that was the reason I couldn't expand it far enough to get the bullet in .
Ok figured that one out so here is my question
If there are 2 sizes for 762x39 308 and 311 I am assuming all barrels are 311 right becuse if they were 308 then the 311 bullet would get stuck right and how is it that a 308 bullet just doesn't bounce around the 311 barrel I am reloading for my ruger American ranch rifile chambered in 762x39 I am afraid to reload the wrong size bullet in the gun please explain to me if I am getting this wrong or is the difference in bullet is so small it doesn't matter thank you all

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Old 11-01-2019, 9:13 AM
kcstott kcstott is offline
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1. You need to match your Dies, Brass, Bullets, and Bore
2. A few suppliers were making 7.62x39mm with 308 barrels.
3. Some barrels are .300 bore with a .310 groove
4. Mic your parts

as far as shooting the wrong bullet. I'd not worry about it too much but you should match it up.
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Old 11-01-2019, 9:47 AM
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Che762x39 Che762x39 is offline
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I reload everything except 7.62x39 Russian.

I had bad experiences reloading 7.62 NATO for a Century Arms L1A1 thirty years ago and decided buying cases of Wolf were cheaper in the long run than reloading the x39. JMHO
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Old 11-01-2019, 9:55 AM
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Che762x39 Che762x39 is offline
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Quote:
Originally Posted by skyline View Post
... I ran into a problem I couldn't get the nick to expand to except the bullet
You need the expander ball on the resizing die to be .308" if you are going to run .308" sized bullets. A .311" expander ball for .311" bullets.
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Old 11-01-2019, 10:00 AM
elk hunter elk hunter is offline
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If you want to know what your barrel bore is then look in your owners manual, if not there contact the maker and ask them. You can match things up pretty well with the info. As a side note to this and "don't" do what I did but I've shot .308 dia. bullets through 7.62X39 guns with varing success, some shot ok some not so ok. I've also shot .311 and .312 bullets through a .308 cal gun and they worked good but none of this was for more than experimentation except one. I tried some pulled 7.62X39 bullets through a very loose bore M1 and it tightened up the group a lot. Matter of fact that H&R M1 shot great with them and I shot it quiet a bit until I got talked out of the rifle. Try to match the bullet to your rifles bore and go from there. HTH
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Old 11-01-2019, 10:09 AM
Jimboecv Jimboecv is offline
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Call Ruger and ask them the bore dimensions. My Ruger American Ranch, I was told, has a .308 bore. Which is nice as it offers more selection. Also, some die manufacturers offer two expanders for 7.62x39 (my RCBS for example) so that gives me choices.
And if you shoot .311 in a .308 bore the projectile won't get stuck.
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Old 11-01-2019, 10:26 AM
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skyline skyline is offline
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Good that was my worries a projectile getting stuck I to have the rcbs dies and it did come with both expander ball so from what i researched most American fire arms that are chambered in the 762x39 are 308 and most imported riffles are the 311 diameter

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Old 11-01-2019, 10:29 AM
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I looked threw my reloading manual and the heaviest 308 was 155 gr 308 that there was load data for does any know if you are able to shoot anything heavier and is there any load data for cfeblk in 762x39

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Old 11-01-2019, 10:42 AM
kcstott kcstott is offline
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Quote:
Originally Posted by skyline View Post
I looked threw my reloading manual and the heaviest 308 was 155 gr 308 that there was load data for does any know if you are able to shoot anything heavier and is there any load data for cfeblk in 762x39

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you can shoot as heavy a bullet as you like. but you will run into two problems.

1. the cartridge will be too long to feed from the mag

2. the rifling will not stabilize the bullet

your best bet it to stick with the 123-124grain bullets and keep the range short.
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Old 11-01-2019, 11:57 AM
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Catch Catch is online now
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Ruger ranch is .308? Mine shoots .310 hornady and .311 Sierra lights out, Tula and wolf ok.
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Old 11-02-2019, 4:31 PM
Jimboecv Jimboecv is offline
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Mine too. Spam can ammo all day, doesn't matter what you feed it. Might be my favorite rifle in the safe right now, definitely best bang for buck. It has amazing performance for the dollar.
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Old 11-02-2019, 9:18 PM
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AGGRO AGGRO is offline
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When in doubt slug your bore.
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Old 11-02-2019, 9:43 PM
J-cat J-cat is offline
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311 bullets shoot fine in 308 barrels depends on the freebore diameter. They will swage down.
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Old 11-03-2019, 4:23 PM
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The lee die kit comes with two different decapper pins. One is .307 the other is .310.
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