Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

neck tension and increased pressure

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-01-2005, 04:08 PM
Junior Member
 
Join Date: Feb 2005
Posts: 6
neck tension and increased pressure

1st question: As you increase your neck tension does the case pressure increase as well. 2nd question: Can you have too much neck tension say 0.010" and cause an unsafe situation. Thanks
Reply With Quote
  #2  
Old 10-01-2005, 04:47 PM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,822
Re: neck tension and increased pressure

For a very simple answer to your questions.

Question one: YES

Question two: Possibly depending on several variables.

What are you shooting and what load/bullet are you using?

Kirby Allen(50)
__________________
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
Reply With Quote
  #3  
Old 10-02-2005, 01:08 PM
LB LB is offline
Silver Member
 
Join Date: Jul 2004
Location: Upland, CA
Posts: 423
Re: neck tension and increased pressure

Yeah, and then if you are dealing with something like a 220 Swift, for instance, you have to decide whether to toss the brass, inside ream, or outside turn the necks. (or whether it is worth it, at this point) You get a lot of brass flow in certain cartridges. So, you have to be careful about your over all length and the possibility that the necks are being crimped when chambered. There is also a possibility that you have developed a "donut" inside, if you have already worked the necks. Just to clarify, you mean .0010 total neck tension, not wall thickness?

What do your primers look like?
Reply With Quote
  #4  
Old 10-04-2005, 11:28 AM
Silver Member
 
Join Date: May 2004
Location: North Louisiana
Posts: 219
Re: neck tension and increased pressure

I don't believe you could possibly put enough neck tension on any type of case to cause a dangerous situation as long as the load is safe. Think about how firmly Factory ammo is crimped, I'm willing to bet that even grossly undersized brass wouldn't hold a bullet as much as those types of crimps. I've seated bullets into cases that were sized w/o expander balls in FL sizers which actually made the bullet stretch the neck when seating and created quite a bit of neck tension. Those bullets are easier to pull than crimped rounds.

Reloader
Reply With Quote
  #5  
Old 10-04-2005, 11:48 AM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,822
Re: neck tension and increased pressure

Reloader,

That is true, to a point. IF you start your load development with X amount of neck tension and work up from there you can produce safe consistant loads most of the time. Only problem with excessively heavy neck tension is that it is seldom consistant from one case to another so that is a problem.

My warning was in reference to taking an established load and increasing the neck tension on that one load, pressure will increase significantly over the previous load.

But I would agree mostly with your comment.

Kirby Allen(50)
__________________
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
Reply With Quote
  #6  
Old 10-05-2005, 09:00 AM
Silver Member
 
Join Date: May 2004
Location: North Louisiana
Posts: 219
Re: neck tension and increased pressure

Fifty, I see your point. I tend to think it probably has much more importance in Magnum Wildcats where the loads are being tested to the limits.

Reloader
Reply With Quote
  #7  
Old 10-05-2005, 12:51 PM
LB LB is offline
Silver Member
 
Join Date: Jul 2004
Location: Upland, CA
Posts: 423
Re: neck tension and increased pressure

It seems to me that there is a relationship between a tight necked chamber, and not so tight, but thickened necks caused by repeat firings. All things being equal, same load, (same reamer) but tight neck versus standard dimensions, the tight neck (chamber) should show more pressure signs? Whether this is achieved by tooling, or by thicker neck walls, the results could be the same.

In other words, I have a rifle with a tight neck. A very safe published load is a hot load, in this rifle. You could say that every rifle is different, but I choose to believe that the flat primers are/were (mostly) due to the tight neck.

Good hunting. LB
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: neck tension and increased pressure
Thread Thread Starter Forum Replies Last Post
Neck tension-- how much ??? GNERGY Reloading 8 10-12-2010 05:35 PM
Neck Tension 7mm Eclipse Reloading 6 09-06-2010 06:22 PM
neck tension col48 Reloading 8 05-02-2006 12:51 PM
.223 Neck Tension JWH Clark Reloading 5 04-02-2006 02:49 AM
Neck Tension? tdv75098 Reloading 6 02-13-2005 07:04 PM


All times are GMT -5. The time now is 11:22 PM.


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