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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Innovative Technologies Collet Die
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<blockquote data-quote="dok7mm" data-source="post: 1801726" data-attributes="member: 90080"><p>I have the collet die on my bench and have used it on previous factory chambered belted magnums, but not so much on my current 7STW and 7RM customs cut with tighter reamer specs.</p><p></p><p>The collet dies are excellent on when using on belted mags that are cut with loose chambers and are run at higher pressures. The brass can expand to the point where standard FL dies can not resize the lower portion of the case, because of length of die & the beveled base. The collet die will resize to the belt.</p><p></p><p>That said, I believe the OPs problem with early case head separation is more likely the result of excessive shoulder bump on each firing. I would find exactly what my base to datum length was in each of my chambers and bump no more than .002". I would also resize to the belt with the collet die, if I was getting expansion in that area.</p><p></p><p>I would suggest the OP do some measuring on each step from new brass to fired brass, circumferences, BTD length and OAL length. Also to cut open some cases to check if there is potential for case separation.</p></blockquote><p></p>
[QUOTE="dok7mm, post: 1801726, member: 90080"] I have the collet die on my bench and have used it on previous factory chambered belted magnums, but not so much on my current 7STW and 7RM customs cut with tighter reamer specs. The collet dies are excellent on when using on belted mags that are cut with loose chambers and are run at higher pressures. The brass can expand to the point where standard FL dies can not resize the lower portion of the case, because of length of die & the beveled base. The collet die will resize to the belt. That said, I believe the OPs problem with early case head separation is more likely the result of excessive shoulder bump on each firing. I would find exactly what my base to datum length was in each of my chambers and bump no more than .002". I would also resize to the belt with the collet die, if I was getting expansion in that area. I would suggest the OP do some measuring on each step from new brass to fired brass, circumferences, BTD length and OAL length. Also to cut open some cases to check if there is potential for case separation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Innovative Technologies Collet Die
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