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Rifles, Reloading, Optics, Equipment
Reloading
Necking down a case from 378 weath to 338-378weath?
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<blockquote data-quote="James H" data-source="post: 126310" data-attributes="member: 5449"><p>When you say the cases look a little funny, what is it about them that looks funny?</p><p></p><p>One concern when necking down brass is that the brass will get thicker in the neck when diameter is reduced. Make sure that a loaded round's neck dia. is no larger than the neck dia. of a fired round. If it is you will either need to ream the necks or turn them so that the neck dia. of a loaded round is equal to or less than the neck dia. of a fired round from the gun you are loading for (ideally .001 to .004 less).</p><p>Also when you resize them, some of the brass will be extruded and make them longer so you will need to trim them or they will be too long and could cause an unsafe condition.</p><p></p><p>RCBS makes case forming dies to do what you are trying to do but they are expensive.</p><p>I hope this helps.</p></blockquote><p></p>
[QUOTE="James H, post: 126310, member: 5449"] When you say the cases look a little funny, what is it about them that looks funny? One concern when necking down brass is that the brass will get thicker in the neck when diameter is reduced. Make sure that a loaded round's neck dia. is no larger than the neck dia. of a fired round. If it is you will either need to ream the necks or turn them so that the neck dia. of a loaded round is equal to or less than the neck dia. of a fired round from the gun you are loading for (ideally .001 to .004 less). Also when you resize them, some of the brass will be extruded and make them longer so you will need to trim them or they will be too long and could cause an unsafe condition. RCBS makes case forming dies to do what you are trying to do but they are expensive. I hope this helps. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Necking down a case from 378 weath to 338-378weath?
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