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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning & annealing question
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<blockquote data-quote="BountyHunter" data-source="post: 267990" data-attributes="member: 12"><p>IMO unless you have a min SAAMI spec chamber OR your brass shows big variances in neck thickness (.002 variance), you have very little (if anything) to gain for a factory chamber for a lot of work.</p><p> </p><p>What size is your fired case at the neck? </p><p> </p><p>What size is your loaded round at the neck? </p><p> </p><p>If you have over .004-.005 difference what do you think you are getting in neck turning?</p><p> </p><p>After 3 firings, the neck work hardens (and at different rates) so any supposed uniformity of neck tension is gone unless you anneal.</p><p> </p><p>You will have to go to a bushing die afterwards normally in order to maintain neck tension.</p><p> </p><p>Plus you are just now putting an undersize neck (smaller) cartridge in an already oversize neck factory chamber. How is this increasing accuracy?</p><p> </p><p>Yes, lube the mandrel turning. </p><p> </p><p>Yes size the cases and then expand the necks before turning. After turning resize the case necks at least.</p><p> </p><p>Hand held turning will often leave distinctive marks around the case. Look for a B&D power screwdriver with sinclair adapter to hold the cases and turn at 180 rpm. Leaves a super smooth cut.</p><p> </p><p>Yes, cut slightly into the shoulder if you have a curved cutter like the K&M. That totally eliminates the donuts.</p><p> </p><p>I anneal before tumbling and sizing. I use the Ken Light machine. Fast and uniform like nothing else.</p><p> </p><p>BH</p></blockquote><p></p>
[QUOTE="BountyHunter, post: 267990, member: 12"] IMO unless you have a min SAAMI spec chamber OR your brass shows big variances in neck thickness (.002 variance), you have very little (if anything) to gain for a factory chamber for a lot of work. What size is your fired case at the neck? What size is your loaded round at the neck? If you have over .004-.005 difference what do you think you are getting in neck turning? After 3 firings, the neck work hardens (and at different rates) so any supposed uniformity of neck tension is gone unless you anneal. You will have to go to a bushing die afterwards normally in order to maintain neck tension. Plus you are just now putting an undersize neck (smaller) cartridge in an already oversize neck factory chamber. How is this increasing accuracy? Yes, lube the mandrel turning. Yes size the cases and then expand the necks before turning. After turning resize the case necks at least. Hand held turning will often leave distinctive marks around the case. Look for a B&D power screwdriver with sinclair adapter to hold the cases and turn at 180 rpm. Leaves a super smooth cut. Yes, cut slightly into the shoulder if you have a curved cutter like the K&M. That totally eliminates the donuts. I anneal before tumbling and sizing. I use the Ken Light machine. Fast and uniform like nothing else. BH [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck turning & annealing question
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