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Rifles, Reloading, Optics, Equipment
Reloading
Neck Turning Winchester brass (7wsm)
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<blockquote data-quote="AZShooter" data-source="post: 608445" data-attributes="member: 5219"><p>I don't see an issue in neck sizing your brass after you trim them. The difference between the mandrel sized necks and the bushing should be close. </p><p></p><p> Here is an alternative way to neck down fired brass without several progressively smaller bushings. Take out the sizer ball from a FL sizing die. Run the brass into die using it as a partial FL sizing die. This will easily reduce the necks to a small dimension as there is a ramping effect within this die. Then run each case into the sizing mandrel followed by the correct bushing die. In some instances if enough brass is removed from a neck wall the FL die will give you the exact dimension without any further sizing. I did that with a tight necked 30 BR, I turned the necks to fit the RCBS FL die which gave me a perfect .0015" neck tension. </p><p></p><p>I went through the exercise you are attempting with a 284 win with a large chamber neck dimension. Only turned the necks enough to clean up the necks all the way around with hopes of getting more consistent bullet release. Didn't get any improvements in accuracy but did crack case necks in a few firings. Learned not to bother with chambers with factory sized (read huge) chamber neck dimensions.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 608445, member: 5219"] I don't see an issue in neck sizing your brass after you trim them. The difference between the mandrel sized necks and the bushing should be close. Here is an alternative way to neck down fired brass without several progressively smaller bushings. Take out the sizer ball from a FL sizing die. Run the brass into die using it as a partial FL sizing die. This will easily reduce the necks to a small dimension as there is a ramping effect within this die. Then run each case into the sizing mandrel followed by the correct bushing die. In some instances if enough brass is removed from a neck wall the FL die will give you the exact dimension without any further sizing. I did that with a tight necked 30 BR, I turned the necks to fit the RCBS FL die which gave me a perfect .0015" neck tension. I went through the exercise you are attempting with a 284 win with a large chamber neck dimension. Only turned the necks enough to clean up the necks all the way around with hopes of getting more consistent bullet release. Didn't get any improvements in accuracy but did crack case necks in a few firings. Learned not to bother with chambers with factory sized (read huge) chamber neck dimensions. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Neck Turning Winchester brass (7wsm)
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