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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm practical help please
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<blockquote data-quote="CogburnR" data-source="post: 1197747" data-attributes="member: 29174"><p>I'm guessing that the cbto is without the comparator subtracted. I have the 270/300wm and my cbto to lands is 3.95" without subtracting the comparator. </p><p></p><p>If you are getting that much expansion and killing brass there is pressure.</p><p></p><p>My guess is that the reamer is a tight neck version and you may need to neck turn the brass for clearance. Check the reamer print is available for the neck dimension and allow for min. neck clearance on loaded rounds. I ran into this kind of thing when the brass needed to be trimmed also. The chamber was basically crimping the bullet in place resulting in pressure.</p></blockquote><p></p>
[QUOTE="CogburnR, post: 1197747, member: 29174"] I'm guessing that the cbto is without the comparator subtracted. I have the 270/300wm and my cbto to lands is 3.95" without subtracting the comparator. If you are getting that much expansion and killing brass there is pressure. My guess is that the reamer is a tight neck version and you may need to neck turn the brass for clearance. Check the reamer print is available for the neck dimension and allow for min. neck clearance on loaded rounds. I ran into this kind of thing when the brass needed to be trimmed also. The chamber was basically crimping the bullet in place resulting in pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm practical help please
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