The Firing Line Forums

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

Reply
 
Thread Tools
Old July 16, 2006, 04:56 PM   #1
Traderjac
Junior Member
 
Join Date: July 16, 2006
Posts: 1
308 soft load

I own a Mas in .308. I noticed firing factory loads signs of high pressure, i.e. flattened primer. What I would like is to know how to lower the pressure safely. I would like to shoot a 100 grain bullet with as little powder as possible to avoid the pressure problem.
I have never read any thing on minimum charges, it is always about maximum charges so I am lost.
Traderjac is offline  
Old July 17, 2006, 02:04 AM   #2
JohnSmallTX
Junior Member
 
Join Date: November 7, 2004
Posts: 13
308 Lite

For lite loads in 30 cal cases I use the Speer 100 grain plinker bullets with 10 grains of Unique powder. I prefer the Speer bullets over the Hornady. The Speer have a slightly rounded bottom which makes the bullet seating easier.
JohnSmallTX is offline  
Old July 17, 2006, 11:55 PM   #3
Dave R
Senior Member
 
Join Date: January 7, 2000
Location: Idaho
Posts: 6,073
I use the same bullet as John, but at a slightly faster loading.

100gr Speer "plinker"
???? Powder charge of H4198
CCI standard (not magnum) large rifle primer.

Shoot, I can't remember the powder charge, and I'm away from my reloading data.

Anyway, the velocity on this is about 2,000 fps, so its about the level of an M-1 Carbine load. Fairly accurate out of the 2 .308's I've tested it in.

I also use the load in my K-31, with good results.
__________________
I am Pro-Rights (on gun issues).
Dave R is offline  
Old July 18, 2006, 03:48 PM   #4
brselman
Member
 
Join Date: February 13, 2006
Location: Johnson City, TN
Posts: 78
try this link:

http://www.hodgdon.com/data/youth/index.php#top
brselman is offline  
Old July 20, 2006, 11:35 PM   #5
Dave R
Senior Member
 
Join Date: January 7, 2000
Location: Idaho
Posts: 6,073
Finally made it back home. The load I use is:

100gr Speer "plinker"
26gr. of H4198
CCI standard (not magnum) large rifle primer.

Shoot, I can't remember the powder charge, and I'm away from my reloading data.

Anyway, the velocity on this is about 2,000 fps, so its about the level of an M-1 Carbine load. Fairly accurate out of the 2 .308's I've tested it in.

I also use the load in my K-31, with good results.
__________________
I am Pro-Rights (on gun issues).
Dave R is offline  
Old July 21, 2006, 01:40 PM   #6
amamnn
Senior Member
 
Join Date: May 13, 2006
Location: WA, the left armpit of the USA
Posts: 1,323
overpressure signs

Flattened primers are certainly a sign of overpressure, but also one of the hardest signs to read. If you truly have overpressure then you will have case head expansion and if you mic that, you'll have no doubt as to what's going on.
__________________
"If the enemy is in range, so are you." - Infantry Journal
amamnn is offline  
Old July 21, 2006, 04:06 PM   #7
castnblast
Senior Member
 
Join Date: July 2, 2006
Location: Corpus Christi TX
Posts: 1,148
1+ on flattened primer. some primers are softer than others. I had flattened primers on my 22-250 winchester factory rounds, but w/ a load I loaded that was .2 gr. over max, I had no flattened primer. It all depends on the alloy in the primer. All reloaders should own a mic, and that is a sure test. Also, if you had trouble opening the bolt, that is a prime sign of too much pressure.
__________________
VEGETARIAN...old indian word for bad hunter
castnblast is offline  
Old July 21, 2006, 04:41 PM   #8
tINY
Senior Member
 
Join Date: April 26, 2005
Location: Orygun
Posts: 2,589


Aren't MAS chambered for 7.62x51 NATO?

Those are spec'd to lower pressures than 308 win.

Make sure to check the headspace on that rifle. If it's out, and you reload, you may be able to load brass fired from it with the bullet seated forward to get it to shoot right.



-tINY

tINY is offline  
Old July 21, 2006, 05:36 PM   #9
Unclenick
Staff
 
Join Date: March 4, 2005
Location: Ohio
Posts: 10,465
NATO ammo is all over the map, except external dimensions. Bullet weights from 122 grains to 186 grains. Powder charges variances as high as 10 grains, and more typically 3 grains. I have a bunch of old M118 that flattens primers like a pancake. Ditto some old Portuguese stuff. Read this before you believe the standardization of 7.62x51 was really successful.

Flat primers are not a reliable indicator, but just one possible indicator among several. Cratering usually gets a little closer to the truth. Expanding case heads was in vogue at one point, but has proven not to be reliable either. Please read Denton Bramwell's analysis of the error, if you have been depending on this indicator.

Nick
__________________
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member
Unclenick 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 04:43 PM.


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 0.09383 seconds with 7 queries