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Rifles, Reloading, Optics, Equipment
Reloading
What's Causing Bullet Runout
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<blockquote data-quote="DUSTY NOGGIN" data-source="post: 1411122" data-attributes="member: 89550"><p>with loaded rounds , concentricty gauge at the case neck place the vee at the middle of neck, then place indicator 3 places </p><p>1. directly over contact at vee , this measurement should be zero runout -- if you see runout here its your necks for sure ( mark the high and lows with sharpie ) </p><p>2. vee still on middle of case neck, indicate right after case mouth on bullet ( as close to mouth of case without touching ) - this measurement will give a fairly consistent neck wall thickness - ( use the reference marks from measurement 1 , which normally will line up with out of concentricity measurement 2 )</p><p>3. vee still at neck center , indicate last available part of jacket on bullet - if 1&2 are fairly close and 3 is very out of wack , i might focus on changing your seating die type </p><p></p><p>i had a basic seater die ( no names to keep it isolated ) that threads for seater plug was not lined up to center-line of die body and would only seat concentric at certain seating depths ( twice every full rotation of seater plug adjustment rotation ) </p><p></p><p>i think every type of die that has a one piece threaded seater plug , is susceptible to this type of failure</p></blockquote><p></p>
[QUOTE="DUSTY NOGGIN, post: 1411122, member: 89550"] with loaded rounds , concentricty gauge at the case neck place the vee at the middle of neck, then place indicator 3 places 1. directly over contact at vee , this measurement should be zero runout -- if you see runout here its your necks for sure ( mark the high and lows with sharpie ) 2. vee still on middle of case neck, indicate right after case mouth on bullet ( as close to mouth of case without touching ) - this measurement will give a fairly consistent neck wall thickness - ( use the reference marks from measurement 1 , which normally will line up with out of concentricity measurement 2 ) 3. vee still at neck center , indicate last available part of jacket on bullet - if 1&2 are fairly close and 3 is very out of wack , i might focus on changing your seating die type i had a basic seater die ( no names to keep it isolated ) that threads for seater plug was not lined up to center-line of die body and would only seat concentric at certain seating depths ( twice every full rotation of seater plug adjustment rotation ) i think every type of die that has a one piece threaded seater plug , is susceptible to this type of failure [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What's Causing Bullet Runout
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