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Rifles, Reloading, Optics, Equipment
Reloading
Full length size
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<blockquote data-quote="bigedp51" data-source="post: 1457468" data-attributes="member: 28965"><p>Below the case grows when full length resized as you can see in the illustration. And as stated above if you measure the "FIRED" case with a Hornady cartridge case headspace gauge you then bump the shoulder back .001 or .002 for minimum head clearance in the chamber.</p><p></p><p>Sometimes this can leave the case too long and the top of the shell holder will need to be lapped to push the case further into the die. "BUT" I have only had to this once in over 47 years of reloading, because most dies will push the shoulder back more than necessary. The instructions with most dies tell you to screw the die down 1/8 to 1/4 of a turn more after the die contacts the shell holder and the press cams over. And this will be maximum shoulder bump and if the case chambers with the die not screwed in as far as above without excessive force closing the bolt you are good to go.</p><p></p><p>Meaning chambers and dies vary in size and how far you screw the die downward can vary regardless of the instructions that come with your dies. </p><p></p><p><img src="https://i.imgur.com/wm05ArY.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p> <img src="https://i.imgur.com/HK76WCp.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Below I'm measuring a "fired" case from my AR15 rifle and then I set the die to bump the shoulder back .003.</p><p></p><p><img src="https://i.imgur.com/H0SXHH8.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="bigedp51, post: 1457468, member: 28965"] Below the case grows when full length resized as you can see in the illustration. And as stated above if you measure the "FIRED" case with a Hornady cartridge case headspace gauge you then bump the shoulder back .001 or .002 for minimum head clearance in the chamber. Sometimes this can leave the case too long and the top of the shell holder will need to be lapped to push the case further into the die. "BUT" I have only had to this once in over 47 years of reloading, because most dies will push the shoulder back more than necessary. The instructions with most dies tell you to screw the die down 1/8 to 1/4 of a turn more after the die contacts the shell holder and the press cams over. And this will be maximum shoulder bump and if the case chambers with the die not screwed in as far as above without excessive force closing the bolt you are good to go. Meaning chambers and dies vary in size and how far you screw the die downward can vary regardless of the instructions that come with your dies. [IMG]https://i.imgur.com/wm05ArY.gif[/IMG] [IMG]https://i.imgur.com/HK76WCp.jpg[/IMG] Below I'm measuring a "fired" case from my AR15 rifle and then I set the die to bump the shoulder back .003. [img]https://i.imgur.com/H0SXHH8.jpg[/img] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Full length size
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