Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Ammo Direct Terminator


User Tag List

+ Reply to Thread
Results 1 to 7 of 7
Like Tree9Likes
  • 1 Post By Cordite
  • 3 Post By Mathias
  • 5 Post By GWH

Thread: Adjusting neck resizer?

  1. #1
    Member
    Join Date
    Dec 2011
    Location
    NI
    Posts
    12,730

    Adjusting neck resizer?

    I bought a neck resizing die. How far down the neck should I resize?

    270wsm

    Thanks

  2. #2
    Member Cordite's Avatar
    Join Date
    May 2017
    Location
    NZ Mainland (Dunedin)
    Posts
    5,525
    The rimless cartridge will headspace on its shoulder, which is not affected by how far down you neck size.

    Rimmed cartridges similarly unaffected by neck sizing for reasons of headspacing on rims.

    If you only size part of the neck, then you need to size at least as far down as you want it to support the bullet bearing surface.
    Tahr likes this.
    An itch ... is ... a desire to scratch

  3. #3
    Member Mathias's Avatar
    Join Date
    Oct 2015
    Location
    Canterbury, home of the big Rakaia Red Stag
    Posts
    4,488
    I usually resize the neck to within 1-1.5mm of the shoulder junction. The neck tension is a fairly important factor, if you want consistent ES etc. I recently did a test with changing the neck tension with my Redding S type bushings. I varied 2 lots of test loads by 0.001" neck tension and on average I attained a 20fps increase with a 0.001" tighter neck and a lower ES. This was on a small cartridge, my 6x45.
    Tahr, GWH and mikee like this.

  4. #4
    GWH
    GWH is offline
    Member
    Join Date
    Jul 2012
    Location
    Napier, Hawkes Bay
    Posts
    4,460
    Bruce, when neck sizing i normally only size 2/3's of the neck, leaving that last 1/3 unsized can in theory help align the neck/bullet better into chamber/bore, and in theory improving accuracy.
    Tahr, mikee, Dama dama and 2 others like this.

  5. #5
    northdude
    Guest
    When i neck size i size as far down the neck as the dia of the bullet makes it easy to remember and works for me

  6. #6
    Banned
    Join Date
    Mar 2016
    Location
    auckland
    Posts
    2,453
    Good thoughts on neck sizing here...I have gone back to fl sizing or partial/bump sizing.

  7. #7
    Member Dead is better's Avatar
    Join Date
    Jan 2012
    Location
    Auckland
    Posts
    977
    Last year i was a no neck size + bump die fan. Cycled the brass to 10x and only then did 4/100 have insufficient NT to grip the projectile. NNT barrel chamber tho. BUT this year im getting the best results putting the brass through the FL die with no expander (it does less NT than my type s. Then i set the actual NT on a mandrel die.

    Tiny bit of mica dust on the shank of the projectile. Feels 100% consistant seating thats for sure. Better than dirty inner necks anyway. I honestly cant feel any variation so i guess thats as good as can be without going full nerd and measuring every projectile and every neck. Gotta be some lines you wont cross. One could go mad doing this

 

 

Similar Threads

  1. Chamber Reamers: Straight Neck or Tapered Neck
    By Puffin in forum Reloading and Ballistics
    Replies: 6
    Last Post: 29-07-2018, 10:17 PM
  2. Adjusting for suppressor?
    By YosemiteSam in forum Reloading and Ballistics
    Replies: 9
    Last Post: 15-08-2017, 02:45 PM
  3. Adjusting Timney trigger below 1.5 lb
    By Echo in forum Firearms, Optics and Accessories
    Replies: 0
    Last Post: 06-07-2017, 07:25 PM
  4. Adjusting MV and BC to match trajectory
    By Bagheera in forum Reloading and Ballistics
    Replies: 19
    Last Post: 14-08-2015, 02:34 PM
  5. Adjusting Shooter ballistic program
    By Mistral in forum Shooting
    Replies: 19
    Last Post: 23-05-2014, 07:49 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!