Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Help, Case Neck Tension

 
LinkBack Thread Tools Display Modes
  #15  
Old 01-17-2008, 06:57 PM
Gold Member
 
Join Date: Sep 2002
Location: Illinois
Posts: 836
Loose the expander ball. Use a button die that you can control the amount of neck tension and size the case to fit the chamber. By the way, the amount of neck tension depends on several things like case size, burn rate, bbl length, primer, bullet seating depth and others.
db
Reply With Quote
  #16  
Old 01-17-2008, 07:46 PM
Platinum Member
 
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,127
Quote:
Originally Posted by dbhostler View Post
Loose the expander ball. Use a button die that you can control the amount of neck tension and size the case to fit the chamber. By the way, the amount of neck tension depends on several things like case size, burn rate, bbl length, primer, bullet seating depth and others.
db
DB,

Could you explain this? You've got me baffled.
Reply With Quote
  #17  
Old 01-17-2008, 09:42 PM
Gold Member
 
Join Date: Sep 2002
Location: Illinois
Posts: 836
The expander in your sizing die is not perfectly concentric and will introduce more runout than if you don't use one, provided you use a quality die. I use a Cartensen FL button die for my 300 RUM. It has no expander on the depriming rod.

When loading a 300 RUM and like cases, you have a lot of powder and usually some air space. In order to get the load burning in the case and not in the barrel you can vary neck tension to hold the bullet longer, use a hotter primer, or seat the bullet deeper in the case. This all effects ES and accuracy. In my 300 I use RL-25, a very slow burning powder, and a Fed. 210 primer with a 30+ inch barrel. I shoot 210-220 grn bullets.

The part about sizing the case to fit the chamber is simply adjusting the die so when you close the bolt you feel slight resistance when pushing the handle down. It helps if you have a die that has been cut on the basis of your chamber dimensions. There are several out there that can do that including Hornady on their CNC machines for a reasonable cost. It is also recommended to remove the ejector spring to help you feel bolt resistance. Cast the chamber if you want to know the actual dimensions.

Clear as mud?
db

Last edited by dbhostler; 01-18-2008 at 07:16 AM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Help, Case Neck Tension
Thread Thread Starter Forum Replies Last Post
Neck tension / case life LRHWAL Reloading 6 03-12-2008 02:33 PM
neck tension col48 Reloading 0 08-06-2006 02:28 AM
.223 Neck Tension JWH Clark Reloading 5 04-02-2006 02:49 AM
Case neck tension w/ std. expander dies Ballistic64 Reloading 3 06-16-2005 09:45 PM
Neck Tension? tdv75098 Reloading 6 02-13-2005 07:04 PM

Current Poll
Do you archery hunt for elk?
YES - 34.38%
120 Votes
NO - 48.42%
169 Votes
Not yet, but I plan to. - 17.19%
60 Votes
Total Votes: 349
You may not vote on this poll.

All times are GMT -5. The time now is 05:33 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC