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Rifles, Reloading, Optics, Equipment
Reloading
REAL differences in sizing methods?
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<blockquote data-quote="woods" data-source="post: 382584" data-attributes="member: 6042"><p>Hey ov, nice Elk!</p><p></p><p>So if you expand the neck with a 30 caliber expander and then start sizing it with a 7mm FL die, are you using the 7mm expander during this resizing?</p><p></p><p>If you are then you could accomplish the same thing by backing your FL die back up 3/4 turn off the shell holder. IOW, raise the ram, screw the die down till it hits, lower the ram and unscrew the die 3/4 turn. That would size about 3/4 of the neck and leave 1/4 of the neck fire formed size. And it would do it without all that work hardening of the brass. It is a common practice and is call "Partial Neck Sizing" with a FL die. Sooner or later you would wind up with a crush fit at the shoulder and need to push it back and IMO sizing of the case body is beneficial to keep the case body from influencing the centering of the case in the chamber.</p><p></p><p>The difference between a typical 30 caliber expander of .306" and a typical 7mm expander of .282" is .016" and that would be a lot of expansion and sizing down and would be of no benefit that I could see.</p></blockquote><p></p>
[QUOTE="woods, post: 382584, member: 6042"] Hey ov, nice Elk! So if you expand the neck with a 30 caliber expander and then start sizing it with a 7mm FL die, are you using the 7mm expander during this resizing? If you are then you could accomplish the same thing by backing your FL die back up 3/4 turn off the shell holder. IOW, raise the ram, screw the die down till it hits, lower the ram and unscrew the die 3/4 turn. That would size about 3/4 of the neck and leave 1/4 of the neck fire formed size. And it would do it without all that work hardening of the brass. It is a common practice and is call "Partial Neck Sizing" with a FL die. Sooner or later you would wind up with a crush fit at the shoulder and need to push it back and IMO sizing of the case body is beneficial to keep the case body from influencing the centering of the case in the chamber. The difference between a typical 30 caliber expander of .306" and a typical 7mm expander of .282" is .016" and that would be a lot of expansion and sizing down and would be of no benefit that I could see. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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REAL differences in sizing methods?
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