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Rifles, Reloading, Optics, Equipment
Reloading
Brass not being bumped back
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<blockquote data-quote="tim_w" data-source="post: 2654348" data-attributes="member: 11132"><p>I would just make sure the shell holder is actually kissing the die base before grinding. You can also order a redding comp shell holder of the thickness needed.</p><p></p><p>I never understood camming over. It's not as if pressing harder (more force) is going to go past shell holder seating against the die base. Your not going to compress the shell holder alloy or the die. Cam over IMO increases the time the case is compressed in the die and that decreases some of the spring back. Same thing can be accomplished by holding at the bottom stroke for an extra couple seconds without camming over.</p><p></p><p>Personally on once fired brass unless it was a wickedly hot load I set die to set shoulder bump to 0.000 of the fired case. This gives real world headspace off the chamber of 0.0015" - 0.002". But it reduces body diameter and does compress the shoulder as the brass flows. So in actuallity it's still sizing the shoulder. The fact your cases sized without contact on the shoulder grew by 0.008" is confirmation of this.</p></blockquote><p></p>
[QUOTE="tim_w, post: 2654348, member: 11132"] I would just make sure the shell holder is actually kissing the die base before grinding. You can also order a redding comp shell holder of the thickness needed. I never understood camming over. It's not as if pressing harder (more force) is going to go past shell holder seating against the die base. Your not going to compress the shell holder alloy or the die. Cam over IMO increases the time the case is compressed in the die and that decreases some of the spring back. Same thing can be accomplished by holding at the bottom stroke for an extra couple seconds without camming over. Personally on once fired brass unless it was a wickedly hot load I set die to set shoulder bump to 0.000 of the fired case. This gives real world headspace off the chamber of 0.0015" - 0.002". But it reduces body diameter and does compress the shoulder as the brass flows. So in actuallity it's still sizing the shoulder. The fact your cases sized without contact on the shoulder grew by 0.008" is confirmation of this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Brass not being bumped back
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