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Rifles, Reloading, Optics, Equipment
Reloading
what do you prefer ? lets here here it.
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<blockquote data-quote="MontanaRifleman" data-source="post: 920131" data-attributes="member: 11717"><p>As I understand it, you never really have more than about .002 neck tension because that is all that brass is going to spring back. i.e., if your neck OD before seating is .290 and after seating is .294, you do not have .004 of neck tension because the brass has been stretched by the seated bullet. If you pull the bullet, your neck OD will/should be about .292.</p><p></p><p>One good thing about using bushings is you can get a bushing to put minimal work on the brass by not pushing the neck in more than it needs to be to provide good tension on the bullet. Off the shelf sizing dies shrink the neck way down then the expander reams it back out which puts a lot of work on the brass.</p><p></p><p>I prefer using a custom FL bushing die or non-bushing sizing die with a neck cut to my specs that does not shrink the neck anymore than 2-3 thou smaller than the seated OD. I like using an expander with it to push the neck out ~ .001 and push outward any irregularities inside the neck. I Like ~ .001 - .002 neck tension and the closer to .001 the better. I have found I tend to get better extreme spreads when neck tension is minimal. </p><p></p><p>I like using a FL die instead of a neck only die (and I've used both) because it returns the case back to the same dimensions every time. If you neck size only, at some point you will have to body/shoulder bump the brass back because the case will continue to grow until you can not chamber it. If you're shooting max loads, this might be after every or every other firing. I found myself having to neck size and body/shoulder size after every firing loading for the 300 </p><p>RUM after the second firing. Using a 2 step process just did not make sense to me so I abandoned it.</p><p></p><p>Also, in my thinking, one of the most important concepts in handloading is consistency. Everything should be consistent and exactly the same everytime for the best precision and predictability. Neck sizing only is counter to this concept IMO.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 920131, member: 11717"] As I understand it, you never really have more than about .002 neck tension because that is all that brass is going to spring back. i.e., if your neck OD before seating is .290 and after seating is .294, you do not have .004 of neck tension because the brass has been stretched by the seated bullet. If you pull the bullet, your neck OD will/should be about .292. One good thing about using bushings is you can get a bushing to put minimal work on the brass by not pushing the neck in more than it needs to be to provide good tension on the bullet. Off the shelf sizing dies shrink the neck way down then the expander reams it back out which puts a lot of work on the brass. I prefer using a custom FL bushing die or non-bushing sizing die with a neck cut to my specs that does not shrink the neck anymore than 2-3 thou smaller than the seated OD. I like using an expander with it to push the neck out ~ .001 and push outward any irregularities inside the neck. I Like ~ .001 - .002 neck tension and the closer to .001 the better. I have found I tend to get better extreme spreads when neck tension is minimal. I like using a FL die instead of a neck only die (and I've used both) because it returns the case back to the same dimensions every time. If you neck size only, at some point you will have to body/shoulder bump the brass back because the case will continue to grow until you can not chamber it. If you're shooting max loads, this might be after every or every other firing. I found myself having to neck size and body/shoulder size after every firing loading for the 300 RUM after the second firing. Using a 2 step process just did not make sense to me so I abandoned it. Also, in my thinking, one of the most important concepts in handloading is consistency. Everything should be consistent and exactly the same everytime for the best precision and predictability. Neck sizing only is counter to this concept IMO. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
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