The Firing Line Forums

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

Reply
 
Thread Tools
Old April 24, 2005, 10:00 AM   #1
arrggg
Member
 
Join Date: December 6, 2004
Posts: 22
fouled case necks

hi, I'm reloading my .308 with 42gr of imr4064 and 168 sierra mk. My cases are all trimmed and neck sized. I am getting alot of fouling on the outside of the case necks after firing. I noticed a little of this ocuring with factory ammo but it is much worse with handloads, the fouling covers almost all of the case neck to the shoulder, does anyone have an idea of what is happening?
arrggg is offline  
Old April 24, 2005, 12:28 PM   #2
Wildalaska
Junior member
 
Join Date: November 25, 2002
Location: In my own little weird world in Anchorage, Alaska
Posts: 14,174
How is accuracy? What velocity are you getting in terms of actual and predicted? What is OND after firing and then after neck sizing?

Wildnecksizes308Alaska
Wildalaska is offline  
Old April 24, 2005, 09:48 PM   #3
arrggg
Member
 
Join Date: December 6, 2004
Posts: 22
accuracy is ok but it seems to be a little inconsistent (maybe its just me)
the necks measure .345 after firing and .336 after sizing.
arrggg is offline  
Old April 24, 2005, 10:40 PM   #4
cheygriz
Senior Member
 
Join Date: May 11, 2002
Location: high up in the rockies
Posts: 2,232
In all likelihood, your load is not generqting enough pressure to expand the case neck tightly in the chamber and you're getting gas blow back. It probably isn't hurting anything, but increasing your powder charge could probably correct the problem.

I've had the same thing occur in target loads in the .30-06.
__________________
If you think a mighty military force is expensive, wait 'til you see what a weak one costs.
cheygriz is offline  
Old April 25, 2005, 07:49 AM   #5
Ruger4570
Senior Member
 
Join Date: April 3, 2005
Location: Rochester, New York
Posts: 2,136
I tend to agree with cheygriz on the problem of not getting enough pressure to expand the necks,,, but,, you are within a couple of grains of a max charge of 4064 also. Therefore it does seem strange to some degree, your neck expansion isn't over the top, but is somewhat larger than my 308. I tend to get case mouth blackining mostly when I use boat tail bullets. I have assumed that the bullet releases and some of the gasses slip back past the boat tail before the case mouth has had time to fully expand. It really isnt a problem and will do no harm, just a little unsightly. I have seen many guns do this to some degree with no ill effect.
Ruger4570 is offline  
Old April 25, 2005, 08:18 AM   #6
woodland
Senior Member
 
Join Date: December 26, 2001
Location: western wa.
Posts: 566
I have also noticed this with both my .308, and my 30-06. It is with factory ammo with mine. I haven't really shot a lot of hand loads in them yet.
__________________
"There is no spoon..."
woodland is offline  
Old April 25, 2005, 10:56 AM   #7
Lennyjoe
Senior Member
 
Join Date: June 28, 2001
Location: Sunny Tucson Arizona
Posts: 1,148
I noticed that as well with my 30-06. I am using 59gr of IMR 4350. Accuracy is 1.5" @100yds out of an older Savage 110 model. Max load is 59gr with a 150gr bullet.
__________________
If you see a Military man or a Vet, stop him and say "Thanks".
Lennyjoe is offline  
Old April 25, 2005, 03:38 PM   #8
Wildalaska
Junior member
 
Join Date: November 25, 2002
Location: In my own little weird world in Anchorage, Alaska
Posts: 14,174
I just had it with full legnth sized 6.5x55s fired in a big mil,itary chamber with a target (ie mil spec) load......

Shjoots good though


WildhungryneedburgernowAlaska
Wildalaska is offline  
Old April 25, 2005, 10:20 PM   #9
arrggg
Member
 
Join Date: December 6, 2004
Posts: 22
ok. I was kinda worried that the gases might damage the chamber prematurely.
arrggg 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 02:20 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 0.07726 seconds with 7 queries