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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning your Brass
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<blockquote data-quote="Mikecr" data-source="post: 1439056" data-attributes="member: 1521"><p>Tim_W's theory about better results with clearance is correct. It's chambered tensions.</p><p>But, this same path also contributes to the offending runout and chambered tensions to begin with. That is, people turn & size for more clearances, and this greatly contributes to the runout they're using clearance to resolve. Roundy roundy..</p><p></p><p>The guy that turns for actual benefit has a plan to reduce clearances, and sizing, so that runout is extremely low, and with this there are no chambered tensions. He can make a gun shoot with ~1thou of clearance, and very little variance in tension -with no need to anneal. No problem.</p><p></p><p>As far as neck thickness variance that you have, run a Sinclair/PMA mandrel through just prior to seating bullets. This pushes some of the variance outward -away from seating bullet bearing. Definitely reduces TIR.</p><p>And never, ever, FL size necks. There is nothing but detriment in this action, for both runout and especially tension. Just,, don't ever do this.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1439056, member: 1521"] Tim_W's theory about better results with clearance is correct. It's chambered tensions. But, this same path also contributes to the offending runout and chambered tensions to begin with. That is, people turn & size for more clearances, and this greatly contributes to the runout they're using clearance to resolve. Roundy roundy.. The guy that turns for actual benefit has a plan to reduce clearances, and sizing, so that runout is extremely low, and with this there are no chambered tensions. He can make a gun shoot with ~1thou of clearance, and very little variance in tension -with no need to anneal. No problem. As far as neck thickness variance that you have, run a Sinclair/PMA mandrel through just prior to seating bullets. This pushes some of the variance outward -away from seating bullet bearing. Definitely reduces TIR. And never, ever, FL size necks. There is nothing but detriment in this action, for both runout and especially tension. Just,, don't ever do this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning your Brass
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