close
Long Range Hunting Online Magazine


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

Reloading Berger Bullets

Reply

Case Neck Thickness Variation

LinkBack Thread Tools Display Modes
  #1  
Unread 03-10-2014, 07:53 PM
Silver Member
 
Join Date: Jun 2013
Posts: 484
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  
    Unread 03-10-2014, 08:50 PM
    Platinum Member
     
    Join Date: Aug 2003
    Location: NC, oceanfront
    Posts: 4,061
    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  
    Unread 03-10-2014, 09:08 PM
    Silver Member
     
    Join Date: Jun 2013
    Posts: 484
    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  
    Unread 03-11-2014, 12:14 AM
    Platinum Member
     
    Join Date: Aug 2003
    Location: NC, oceanfront
    Posts: 4,061
    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  
    Unread 03-11-2014, 12:45 AM
    Silver Member
     
    Join Date: Jun 2013
    Posts: 484
    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  
    Unread 03-11-2014, 12:48 AM
    Platinum Member
     
    Join Date: Apr 2012
    Location: California Central Coast
    Posts: 3,120
    Re: Case Neck Thickness Variation

    Turn em all to .0145
    __________________
    Fred Seaman - NRA Life Member
    “Ask, Listen, Learn, Grow”
    "Quit worrying about the little things, good luck and god speed"
    Reply With Quote
      #7  
    Unread 03-11-2014, 12:54 AM
    Silver Member
     
    Join Date: Jun 2013
    Posts: 484
    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 02:56 PM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC