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
Headspace adjustment with Shellholder??
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="bigedp51" data-source="post: 1337740" data-attributes="member: 28965"><p>Magnun72576</p><p>Below I'm measuring a "fired" .223/5.56 Lake City case and then used the +.004 competition shell holder for .003 shoulder bump for my AR15 rifle.</p><p></p><p><img src="http://i.imgur.com/H0SXHH8.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Rimmed and belted cases are from a older age when shoulder location was not critical. Even today the new unfired Remington .303 British case below has the shoulder location much shorter than chamber shoulder location.</p><p></p><p><img src="https://www.milsurps.com/images/imported/2009/06/IMGP5199-1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Chambers and dies vary in size and you need to measure a fired case for shoulder location and adjust the die accordingly for proper shoulder set back. You could just neck size only until you feel resistance closing the bolt, this will give you a better idea of the shoulder location of the chamber. Then set the die for .001 to .002 shoulder bump.</p><p></p><p>Again get a Hornady cartridge case headspace gauge and measure a fire case. It sounds like with even the +.010 shell holder your die pushed the case shoulder back too far.</p><p></p><p>Normally with the +.010 shell holder the case shoulder would be squeezed forward when sized and the case would end up "LONGER" than the chamber. My WAG to your problem is you have a long chamber and a short die that is pushing the shoulder back too far.</p><p></p><p><img src="http://i.imgur.com/wm05ArY.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>NOTE, I have a Lee .223 full length die if using a standard shell holder that will push the case shoulder back .009 shorter than my .223 GO gauge. So again dies and chambers vary in size and nothing is written in stone.</p></blockquote><p></p>
[QUOTE="bigedp51, post: 1337740, member: 28965"] Magnun72576 Below I'm measuring a "fired" .223/5.56 Lake City case and then used the +.004 competition shell holder for .003 shoulder bump for my AR15 rifle. [IMG]http://i.imgur.com/H0SXHH8.jpg[/IMG] Rimmed and belted cases are from a older age when shoulder location was not critical. Even today the new unfired Remington .303 British case below has the shoulder location much shorter than chamber shoulder location. [IMG]https://www.milsurps.com/images/imported/2009/06/IMGP5199-1.jpg[/IMG] Chambers and dies vary in size and you need to measure a fired case for shoulder location and adjust the die accordingly for proper shoulder set back. You could just neck size only until you feel resistance closing the bolt, this will give you a better idea of the shoulder location of the chamber. Then set the die for .001 to .002 shoulder bump. Again get a Hornady cartridge case headspace gauge and measure a fire case. It sounds like with even the +.010 shell holder your die pushed the case shoulder back too far. Normally with the +.010 shell holder the case shoulder would be squeezed forward when sized and the case would end up "LONGER" than the chamber. My WAG to your problem is you have a long chamber and a short die that is pushing the shoulder back too far. [IMG]http://i.imgur.com/wm05ArY.gif[/IMG] NOTE, I have a Lee .223 full length die if using a standard shell holder that will push the case shoulder back .009 shorter than my .223 GO gauge. So again dies and chambers vary in size and nothing is written in stone. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Headspace adjustment with Shellholder??
Top