Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
To neck size or full length size???
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Mikecr" data-source="post: 957138" data-attributes="member: 1521"><p>This should provide the best you can get:</p><p>Your Loaded OD = .2455</p><p>Size to OD = ~.2425</p><p>Minus springback = ~.2435</p><p>Expand to .2455</p><p>Minus springback = ~.2445 (1thou tension)</p><p>Expansion is important to drive thickness variance outward(away from seating bullets), and to normalize seating forces to rational and accurate.</p><p>-Further lowering of TIR, and tension variance: partial neck sizing instead of full.</p><p>-Even further reduction in TIR: inline seater die(hand die) instead of threaded.</p><p>-Another reduction in TIR and tension variance: Culling out case thickness variance</p><p>-And another reduction in TIR and tension variance: Culling out case thickness variance and then neck turning.</p><p>-Final reduction in TIR and tension variance: Tight neck clearance</p><p></p><p>When you apply most of these actions to every aspect(full body, shoulder & neck) of modern/improved cases(not an 06), put enough barrel steel around the chamber, and test/measure max pressure growth to this plan, then you make and maintain straight ammo with consistent neck tension and bullet grip -without continual annealing and trimming, etc. Things just get a lot easier.</p><p></p><p>But it doesn't happen without understanding and a plan. And barring luck(ok, serious luck with RCBS), it usually takes a custom chamber and/or custom dies. Many around here have already spent money beyond this, but don't have it.. They're still headed for step #1: Understanding</p></blockquote><p></p>
[QUOTE="Mikecr, post: 957138, member: 1521"] This should provide the best you can get: Your Loaded OD = .2455 Size to OD = ~.2425 Minus springback = ~.2435 Expand to .2455 Minus springback = ~.2445 (1thou tension) Expansion is important to drive thickness variance outward(away from seating bullets), and to normalize seating forces to rational and accurate. -Further lowering of TIR, and tension variance: partial neck sizing instead of full. -Even further reduction in TIR: inline seater die(hand die) instead of threaded. -Another reduction in TIR and tension variance: Culling out case thickness variance -And another reduction in TIR and tension variance: Culling out case thickness variance and then neck turning. -Final reduction in TIR and tension variance: Tight neck clearance When you apply most of these actions to every aspect(full body, shoulder & neck) of modern/improved cases(not an 06), put enough barrel steel around the chamber, and test/measure max pressure growth to this plan, then you make and maintain straight ammo with consistent neck tension and bullet grip -without continual annealing and trimming, etc. Things just get a lot easier. But it doesn't happen without understanding and a plan. And barring luck(ok, serious luck with RCBS), it usually takes a custom chamber and/or custom dies. Many around here have already spent money beyond this, but don't have it.. They're still headed for step #1: Understanding [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
To neck size or full length size???
Top