The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools
Old August 22, 2014, 09:14 PM   #1
precision_shooter
Senior Member
 
Join Date: September 8, 2007
Location: DFW, Texas
Posts: 1,641
7.62x39 and Varget?

Anyone load 7.62x39 using Varget, or is it too slow-burning?

I like to load with powders that can be used across multiple calibers, but can't find any load data using Varget. Sure would be nice if it can be used with acceptable results...

What say the braintrust of TFL?
__________________
"Laws that forbid the carrying of arms...disarm only those who are neither inclined nor determined to commit crimes...Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man." - Thomas Jefferson, 1776
precision_shooter is offline  
Old August 22, 2014, 09:41 PM   #2
Red_Eagle
Senior Member
 
Join Date: February 3, 2007
Location: Western NY
Posts: 589
You can use H-322 , H-335, and Reloder 7 in both. I only have personal experience with 322 in 7.62x39mm.
__________________
My Calibers: 22 Hornet, 223 Rem, 22-250, 243 Win, 270 Win, 280 Remington Ackley Improved, 30-30, 308 Win, 30-06, 300 Winchester magnum, 7.62x39mm, 380 Auto, 9mm Parabellum, 38 Special, 357 magnum, 40 S&W, 10mm Auto, 45 GAP, 45 Auto, 12 & 20 Guage
Red_Eagle is offline  
Old August 22, 2014, 10:03 PM   #3
Jim243
Senior Member
 
Join Date: January 5, 2009
Location: Just off Route 66
Posts: 4,520
Nope, I use IMR-4198.

Jim
__________________
Si vis pacem, para bellum
Jim243 is offline  
Old August 22, 2014, 10:50 PM   #4
chris in va
Senior Member
 
Join Date: December 26, 2004
Location: Louisville KY
Posts: 12,528
Varget is too slow for x39. It's a strange caliber powder-wise, needs a faster powder despite the heavier pill. I like 4227 or 4198.
chris in va is offline  
Old August 23, 2014, 06:42 AM   #5
steve4102
Senior Member
 
Join Date: December 23, 2005
Location: Minnesota
Posts: 2,202
It's slow and rather bulky. Hodgdon has data using BL-C(2), which is slower than Varget, but less bulky.

You would have to heavily compress the Varget to get it to perform. I like heavily compressed loads, but 120% is a bit much.

{Edit for board copyright policy reasons. See the board policy on posting copyrighted materials. Too big a volume and no attribution to QuickLOAD. Note that in a quirk of the law, the copyright does not apply to the data behind the numbers, but just to the presentation format. If you were to copy the QuickLOAD output into Excel and reformat it and use your own labels and so on, then it would be O.K. to post. The attribution should still be made.}

Last edited by Unclenick; August 23, 2014 at 09:35 AM.
steve4102 is offline  
Old August 23, 2014, 08:36 AM   #6
precision_shooter
Senior Member
 
Join Date: September 8, 2007
Location: DFW, Texas
Posts: 1,641
I appreciate all the info fellas! I'm not a fan of compressed loads and even with 100% case fill looks like it's not even reaching 2,100fps.

Looks like I will be searching for another powder to add to my shelf.

Again, thanks for the very helpful info!
__________________
"Laws that forbid the carrying of arms...disarm only those who are neither inclined nor determined to commit crimes...Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man." - Thomas Jefferson, 1776
precision_shooter is offline  
Old August 23, 2014, 09:27 AM   #7
Unclenick
Staff
 
Join Date: March 4, 2005
Location: Ohio
Posts: 10,256
Precision Shooter,

The capacity of the case relative to bore diameter and the sectional density of the bullet determine how quickly the volume the powder is burning in expands as the bullet moves forward. When that ratio is small or the bullet has low sectional density (light weight for caliber), expansion is quick. Quick expansion requires you make gas quickly to keep up with that volume growth in order to reach the desired peak pressure. That means either using a fast powder or using so much of a slow powder that the amount of burning surface area is so great it still makes gas fast enough to do the job, even though each individual grain is not burning at a quick rate.

In general, it is best to avoid the case packing, large quantity of slow powder solution because it can result in momentary pressures that can ring a barrel. Stick with the burn rate-appropriate powders for ease of loading and peace of mind about your gun's condition.

From shootingsoftware.com With kind permission from Jim Ristow, is an example of a commercial round loaded with a powder too slow for the bullet weight. The jump late in the pressure curve is not an actual pressure, but a wave in the steel reflecting back from a radially bulging event a ways down the barrel from the chamber. This registers on a strain gauge which measures strain in the steel, but not on a copper crusher or piezo transducer, which register only gas pressure at the chamber. It is believed to be caused by rapid expansion dropping pressure, after which the powder burning speeds up (normal for a spherical powder that has burned through it highest deterrent concentration) with the resulting gas mass and yet-unburned powder mass accelerating to catch up with the base of the bullet, rear-ending it and resulting in a momentary compression zone at the bullet base that produces the bulging and eventual ringing effect. Either going to a faster powder or to a heavier bullet mitigates the effect.

__________________
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member

Last edited by Unclenick; August 23, 2014 at 09:32 AM.
Unclenick is offline  
Old August 23, 2014, 09:58 AM   #8
precision_shooter
Senior Member
 
Join Date: September 8, 2007
Location: DFW, Texas
Posts: 1,641
Thanks Uncle Nick! This place never ceases to amaze me with the amount of knowledge and valuable info provided by the members!

Excuse me while I take a couple hours to absorb the info.
__________________
"Laws that forbid the carrying of arms...disarm only those who are neither inclined nor determined to commit crimes...Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man." - Thomas Jefferson, 1776
precision_shooter is offline  
Old August 23, 2014, 02:25 PM   #9
tangolima
Senior Member
 
Join Date: September 28, 2013
Posts: 613
Didn't use varget but n135 which is slightly faster than varget. It didn't work well. Never able to make decent speed and I am too stingy to burn more powder than needed, so l went to imr4198 when I managed to find some.

I don't quite like imr4198 either as it sucks in metering. I will try something else when I burn through the last lb I still have.

-TL
tangolima is offline  
Old August 24, 2014, 05:28 PM   #10
bfoosh006
Senior Member
 
Join Date: February 17, 2009
Posts: 346
Accurate LT32....2230, 2200,2015... etc

http://blog.westernpowders.com/wp-co...ate1-28-14.pdf
bfoosh006 is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.08336 seconds with 9 queries