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Rifles, Reloading, Optics, Equipment
Reloading
Case neck runout
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<blockquote data-quote="woods" data-source="post: 877592" data-attributes="member: 6042"><p>If you do order a die from Lee, order some undersize mandrels at the same time. They are cheap but there is a minimum order dollar wise. The die should put you over the minimum.</p><p></p><p>I would order a mandrel at .306" & .305". Then you can experiment with a better bullet grip than the mandrel which comes with the die will give you. It should be about .307"</p><p></p><p>Your actual bullet grip will vary a very little bit because of the work hardening or annealing practices. Work hardened brass will springback more and eventually you will get less bullet grip. Annealing at that point will give you more grip.</p><p></p><p>With the 300RUM I would recommend (again my advice is worth what you are paying for it) trying for a grip of at least .002" and .003" is usually what I like.</p><p></p><p>There is a learning curve with the LCNS and different opinions on adjustment but adjusting according to directions is always a good place to start.</p><p></p><p>Your runout on the case neck will not be absent if you have a big variance in your neck thickness, but the runout on the bullet should be good. IOW the LCNS will make the neck ID consistent and push the neck thickness variances to the outside of the neck.</p></blockquote><p></p>
[QUOTE="woods, post: 877592, member: 6042"] If you do order a die from Lee, order some undersize mandrels at the same time. They are cheap but there is a minimum order dollar wise. The die should put you over the minimum. I would order a mandrel at .306" & .305". Then you can experiment with a better bullet grip than the mandrel which comes with the die will give you. It should be about .307" Your actual bullet grip will vary a very little bit because of the work hardening or annealing practices. Work hardened brass will springback more and eventually you will get less bullet grip. Annealing at that point will give you more grip. With the 300RUM I would recommend (again my advice is worth what you are paying for it) trying for a grip of at least .002" and .003" is usually what I like. There is a learning curve with the LCNS and different opinions on adjustment but adjusting according to directions is always a good place to start. Your runout on the case neck will not be absent if you have a big variance in your neck thickness, but the runout on the bullet should be good. IOW the LCNS will make the neck ID consistent and push the neck thickness variances to the outside of the neck. [/QUOTE]
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Reloading
Case neck runout
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