7.62x39 load question

hutchster

hutchster

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do any of you fella's have an actual manual that lists the 7.63x39?

my nosler manual doesn't list it, so i got some data off the hodgdon website, and the load is as follows:

125 grn spr bullet(my actual bullet isn't listed but its a 123 grn hornady)

H322

min 28.0

max 29.0

i loaded up 25 rounds at 28.0 grains of the H322 and am finding that it seems that when the bullet is seated to the listed oal of 2.150", there's no space between the bullet and powder, i'm used to my 7mm's and .223 having some space between the bullet and powder which when shaken gives you the shaker sound.

is it normal to have that tight of a load?

what do the printed manuals list for this?

thanks
hutchster
 
Generally speaking, compressing powder is a bad thing. The airspace (and its oxygen) is essential for adequate combustion. That said, too much air space isn't going to give you proper contact between the powder and the primer.
 
Load for the bullet weight. Who made it doesn't matter. Hodgdon's data will do nicely. Use 125 grain data. The 2 grains won't matter.
"...there's no space between the bullet and powder..." How can you tell? Shaking doesn't tell you much. In any case, compressed loads are nothing to worry about. Your H322 load are not compressed though. You just can't hear it in that wee case.
The latest Lyman manual likely has the cartridge. It's not a cheap book. Last I looked, the 28th Edition was $50Cdn. in a shop here in London. Sierra's manual definitely has it. It'll only have data for their bullets though. I'd bet the Hornady manual does too.
 
Hornady 7th Edition, 2007

Hornady 123 gr SP

H322 powder
1900fps 25.0
2000fps 26.2
2100 fps 27.3
2200 fps 28.5gr. Max load use with caution is what the book states

B.C : 0.252
COL 2.190"
 
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that sounds like a decent load my lyman manual lists this cartridge i believe thinking of getting into loading it myself....


i was kinna scared the first time we loaded .223 with varget and watched the powder getting compressed into the case.... the first shot was into the ground with everyone else outside of our shooting hut;)....all was fine:)....
 
I found when loading some of the longer grain stick powder straight from the hopper it was filling the casings greater than if I funneled the powder in individually as the sticks had time to settle and lay down. More time consuming, but it seemed to work better.
 
Generally speaking, compressing powder is a bad thing. The airspace (and its oxygen) is essential for adequate combustion.
Click to expand...

I've always found that when you don't actually know the answer it is best not to make up complete BS as it just makes you look stupid! :(

Slightly compressed loads are actually better for accuracy because there is no difference in how the powder sits in the case for each shot.

Smokeless powder has more than enough O2 contained within the molecular structure of the powder for it to burn. Even if it didn't, there is lots of air between the powder granules.

Are you really suggesting that in a long cartridge like the 30-06, the airspace at the very top of the case somehow effects how the powder, almost 2 inches away, at the base of the case burns?
 
Suputin said:
I've always found that when you don't actually know the answer it is best not to make up complete BS as it just makes you look stupid! :(
Click to expand...

The internet is a wonderful place where there will always be someone who knows a subject better than another. Even cautious and conditional statements get criticized. And thanks for the encouragement!
 
maple_leaf_eh said:
Generally speaking, compressing powder is a bad thing. The airspace (and its oxygen) is essential for adequate combustion. That said, too much air space isn't going to give you proper contact between the powder and the primer.
Click to expand...

This is absolute hogwash. There is more than enough oxygen between the grains of powder for proper ignition. You get more consistent ignition with a higher load density. You can compress stick powders, but it's not advisable to attempt to compress ball powders any amount. Please do not give advice to new reloaders if you do not understand it yourself, as it may create a dangerous situation.
Mike
 
Swiend said:
I don't mean to hijack, has anyone used 150gr sp's? I have a bunch of Speer .311's and a pound of H4895, sounds like a good deer round.
Click to expand...

4895 is probably too slow a powder to provide all that good a velocity, but it would work (ie: should be safe, and make enough pressure to cycle a semi-auto).

Something more like H322 or the like would be closer to ideal. I use WC-735 with my 150 grain loads (surplus powder I get from Higginson that's not too far off of H322 for burn rate), and with as much powder as I can fit in the case, it's just about spot-on for what you can expect (2200FPS and the flimsy little thin walled brass Winchester makes is still holding up well with no pressure signs).
 
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