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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
throating 7mmRemMag for 180 eld-m
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<blockquote data-quote="AKSavage" data-source="post: 1391854" data-attributes="member: 95938"><p>OK, I have it now, and my numbers match yours. .268" of freebore it is. First of all, looking closer at both reamer prints the reference line IS marked at .22" from the bolt face. Take the distance marked from the reference line to the end of the neck and add .22" and I get 2.5398". And looking at a SAAMI drawing, the reference line is at the top of the belt.</p><p></p><p>For those interested, the trick is to add in the distance it takes for a 1.5 degree angle to taper .00025" off of each side, reducing the diameter from .2845" down to .2840".(.00025/tan(1.5)=.0095") So, take 2.5398 and add .0095" to get 2.5493". Subtract this from 2.818 to get .2687" of freebore.</p></blockquote><p></p>
[QUOTE="AKSavage, post: 1391854, member: 95938"] OK, I have it now, and my numbers match yours. .268" of freebore it is. First of all, looking closer at both reamer prints the reference line IS marked at .22" from the bolt face. Take the distance marked from the reference line to the end of the neck and add .22" and I get 2.5398". And looking at a SAAMI drawing, the reference line is at the top of the belt. For those interested, the trick is to add in the distance it takes for a 1.5 degree angle to taper .00025" off of each side, reducing the diameter from .2845" down to .2840".(.00025/tan(1.5)=.0095") So, take 2.5398 and add .0095" to get 2.5493". Subtract this from 2.818 to get .2687" of freebore. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
throating 7mmRemMag for 180 eld-m
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