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Rifles, Reloading, Optics, Equipment
Reloading
I assume this tool gives me distance to lands?
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<blockquote data-quote="Mikecr" data-source="post: 1089963" data-attributes="member: 1521"><p>Your actual chamber has length beyond shoulder contact, and the actual barrel throat breaks in and erodes.</p><p>New brass also varies in shoulder dimensions/angles, it doesn't match your chamber shoulder yet, and then won't again with bumping.</p><p>So there may be a window where your tool is relatively good or even perfect, but fleeting.</p><p></p><p>IMO, best measure of touching COAL/CBTO is from the boltface.</p><p>Search around a bit for all the Hornady OAL issues everyone seems to be having. They have these problems because they're trying to take datum off shoulders. This, as you're considering with that gizzy.</p><p>On the other hand, those of us measuring to boltface with the old cleaning rod approach -no problems there.</p><p></p><p>Your tool is very useful, I have a few myself, for comparative shoulder bump measure.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1089963, member: 1521"] Your actual chamber has length beyond shoulder contact, and the actual barrel throat breaks in and erodes. New brass also varies in shoulder dimensions/angles, it doesn't match your chamber shoulder yet, and then won't again with bumping. So there may be a window where your tool is relatively good or even perfect, but fleeting. IMO, best measure of touching COAL/CBTO is from the boltface. Search around a bit for all the Hornady OAL issues everyone seems to be having. They have these problems because they're trying to take datum off shoulders. This, as you're considering with that gizzy. On the other hand, those of us measuring to boltface with the old cleaning rod approach -no problems there. Your tool is very useful, I have a few myself, for comparative shoulder bump measure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
I assume this tool gives me distance to lands?
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