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Rifles, Reloading, Optics, Equipment
Reloading
Problem with Redding Full Length S Die
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<blockquote data-quote="Bart B" data-source="post: 778652" data-attributes="member: 5302"><p>A few thousandths spread in case headspace is normal when one of more of the following happens:</p><p></p><p>* Case lube's not uniformly applied all over the case. The press will spring up to different amounts above the shellholder depending on the friction between the case and die making case headspace vary a few thousandths.</p><p></p><p>* Press ram's not held all the way up for the same amount of time; more time allows the press spring to reset pulling the die back down a bit more on the case setting the shoulder back a bit more.</p><p></p><p>Three things will reduce the spread in sized case headspace:</p><p></p><p>* Apply case lube more uniformly on cleaned cases. I tumble mine in a foam lined coffee can with a few drops of case lube on the foam, then fill the can half full of cleaned cases. Tumble 'em for 20 minutes.</p><p></p><p>* Get a massive single-stage press that doesn't have any significant spring when full length sizing cases. Expensive, but they are good at this.</p><p></p><p>* Use a Redding competition shell holder of the height needed to stop it against the die's bottom so case headspace will have the least spread regardless of case lube or press spring issues. These come in a set with height increments of .002" above the standard .125" height. Best solution in my opinion.</p><p></p><p>Regarding that ring just below the case shoulder..... It looks to me like the case body diameter is smaller than the die's body diameter and the die's pushing the shoulder back enlarging the body-shoulder junction. Have you measrued case diameters 1/4" behind the shoulder both before and after sizing them in that die?</p></blockquote><p></p>
[QUOTE="Bart B, post: 778652, member: 5302"] A few thousandths spread in case headspace is normal when one of more of the following happens: * Case lube's not uniformly applied all over the case. The press will spring up to different amounts above the shellholder depending on the friction between the case and die making case headspace vary a few thousandths. * Press ram's not held all the way up for the same amount of time; more time allows the press spring to reset pulling the die back down a bit more on the case setting the shoulder back a bit more. Three things will reduce the spread in sized case headspace: * Apply case lube more uniformly on cleaned cases. I tumble mine in a foam lined coffee can with a few drops of case lube on the foam, then fill the can half full of cleaned cases. Tumble 'em for 20 minutes. * Get a massive single-stage press that doesn't have any significant spring when full length sizing cases. Expensive, but they are good at this. * Use a Redding competition shell holder of the height needed to stop it against the die's bottom so case headspace will have the least spread regardless of case lube or press spring issues. These come in a set with height increments of .002" above the standard .125" height. Best solution in my opinion. Regarding that ring just below the case shoulder..... It looks to me like the case body diameter is smaller than the die's body diameter and the die's pushing the shoulder back enlarging the body-shoulder junction. Have you measrued case diameters 1/4" behind the shoulder both before and after sizing them in that die? [/QUOTE]
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Reloading
Problem with Redding Full Length S Die
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