Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

Case Neck Thickness Variation

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-10-2014, 07:53 PM
Silver Member
 
Join Date: Jun 2013
Posts: 242
Case Neck Thickness Variation

I know this has been touched on in many threads but I can't seen to find an answer that directly relates to my question:

I'm sorting brass by neck variation to get more consistent groups for 1000 yard. I'm trying to avoid turning. What is tolerable inconsistency in a neck?

My Lapua 308 brass runs from .0145" -.017".
50% of it is .015"-.016" within a case.
I have some running .015"-.0155" and some .0155"-.016.
There are very few cases that run .0145"-.015" or .016"-.017".

Any suggestions?
Reply With Quote
  #2  
Old 03-10-2014, 08:50 PM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,337
Re: Case Neck Thickness Variation

You didn't say your chamber neck diameter.
Personally, I cull anything outside .0005 total variance around necks, and covering desired thickness(whether turning or not). I do this to reduce runout down the road, and to ensure I'm not overworking necks in sizing, and to match my brass in H20 capacity.

Your variance spread is higher than normal though.
What are you measuring with?
Reply With Quote
  #3  
Old 03-10-2014, 09:08 PM
Silver Member
 
Join Date: Jun 2013
Posts: 242
Re: Case Neck Thickness Variation

Quote:
Originally Posted by Mikecr View Post
You didn't say your chamber neck diameter.
Personally, I cull anything outside .0005 total variance around necks, and covering desired thickness(whether turning or not). I do this to reduce runout down the road, and to ensure I'm not overworking necks in sizing, and to match my brass in H20 capacity.

Your variance spread is higher than normal though.
What are you measuring with?
Fired case: .340”-.341”
Finished Lapua cartridge w/ bullet: .337”-.338”
Using a Redding Case Neck Gauge. There is a bit of slop in it.
Reply With Quote
  #4  
Old 03-11-2014, 12:14 AM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,337
Re: Case Neck Thickness Variation

Quote:
Originally Posted by bill123 View Post
Using a Redding Case Neck Gauge.
This is why you're getting so much variance..
You need a neck micrometer with a stop.
Reply With Quote
  #5  
Old 03-11-2014, 12:45 AM
Silver Member
 
Join Date: Jun 2013
Posts: 242
Re: Case Neck Thickness Variation

Quote:
Originally Posted by Mikecr View Post
This is why you're getting so much variance..
You need a neck micrometer with a stop.
When I say slop I'm talking maybe 1-2 ten thousandths. What is the Redding tool used for?
Reply With Quote
  #6  
Old 03-11-2014, 12:48 AM
Platinum Member
 
Join Date: Apr 2012
Location: California Central Coast
Posts: 1,202
Re: Case Neck Thickness Variation

Turn em all to .0145
__________________
Fred Seaman
“Ask, Listen, Learn, Grow”
Reply With Quote
  #7  
Old 03-11-2014, 12:54 AM
Silver Member
 
Join Date: Jun 2013
Posts: 242
Re: Case Neck Thickness Variation

Quote:
Originally Posted by jfseaman View Post
Turn em all to .0145
I was hoping to avoid turning by sorting and shooting like batches. Anyone use that strategy?
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 02:24 PM.


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