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Rifles, Reloading, Optics, Equipment
Reloading
Neck Tension on Bullet
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<blockquote data-quote="Kevin Thomas" data-source="post: 794273" data-attributes="member: 15748"><p>Reloader222,</p><p> </p><p>This is where the Type-S or other bushing dies shine, and their real reason for existing. Brass neck thicknessess vary considerably from brand to brand. The only way the die makers have to deal with this is to size the necks down excessively, then open them back up to proper I.D. with an expander ball. Sounds like your 222 worked out pretty well in this regard, but that's really just a matter of coincidence. In the 270, you're seeing the more typical result, and that's where the excessive neck tension is coming from. </p><p> </p><p>The bushing dies allow you to select a bushing that reduces the O.D. to the correct dimensions that the end result is the correct I.D. for whatever caliber you're dealing with. Works very well, and again, it often requires several different bushing sizes for a given caliber, depending on which brand of brass is being used and its particular neck dimensions. </p><p> </p><p>Go to the bushing dies, and select a bushing that's about .002" under the measured O.D. of a loaded round with that brass. That's a good place to start, and a little fine tuning may help accuracy. Just understand that you may need several different size bushings, if you're using several different makes of brass. All part of the process, but that should solve the problem.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 794273, member: 15748"] Reloader222, This is where the Type-S or other bushing dies shine, and their real reason for existing. Brass neck thicknessess vary considerably from brand to brand. The only way the die makers have to deal with this is to size the necks down excessively, then open them back up to proper I.D. with an expander ball. Sounds like your 222 worked out pretty well in this regard, but that's really just a matter of coincidence. In the 270, you're seeing the more typical result, and that's where the excessive neck tension is coming from. The bushing dies allow you to select a bushing that reduces the O.D. to the correct dimensions that the end result is the correct I.D. for whatever caliber you're dealing with. Works very well, and again, it often requires several different bushing sizes for a given caliber, depending on which brand of brass is being used and its particular neck dimensions. Go to the bushing dies, and select a bushing that's about .002" under the measured O.D. of a loaded round with that brass. That's a good place to start, and a little fine tuning may help accuracy. Just understand that you may need several different size bushings, if you're using several different makes of brass. All part of the process, but that should solve the problem. [/QUOTE]
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Reloading
Neck Tension on Bullet
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