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Rifles, Reloading, Optics, Equipment
Reloading
To turn or not (necks)
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<blockquote data-quote="nheninge" data-source="post: 278391" data-attributes="member: 13085"><p>The K&m arbor with force measurement is great (I also use it routinely) but it is also an <em>indirect</em> measurement consisting of many factors including: neck tension, neck thickness, neck uniformity/neck imperfections, lubrication, bullet shape etc. "Seating force" is the best measurement we have to measure these variations in case prep when seating bullets.</p><p></p><p>I returned my RCBS casemaster waaaaaay back. Just felt cheap, and that bushing neck thickness thing had way too much play for my liking. It just felt like it was built by the lowest bidder. </p><p></p><p>I did verify the case thickness throughout the case with the RCBS tool though. I modified a bar to fit in the tool similiar to the case head separation bar (just long enough to fit in the neck and still make contact with the inside of the brass) and found thick/thin sides consistently down the length of the cases at the same spot represented on the neck. This is fact. And the banana case theory has quite a bit of discussion/research as well. This theory's effects are mostly negated "IF" you sort by neck variation. I still index my cases squarely behind the recoil lug (which makes no sense) but I guess I do this because it is consistent.</p><p></p><p>I think in the car too. Hope we all never meet while driving or we may CRASH!!!</p></blockquote><p></p>
[QUOTE="nheninge, post: 278391, member: 13085"] The K&m arbor with force measurement is great (I also use it routinely) but it is also an [I]indirect[/I] measurement consisting of many factors including: neck tension, neck thickness, neck uniformity/neck imperfections, lubrication, bullet shape etc. "Seating force" is the best measurement we have to measure these variations in case prep when seating bullets. I returned my RCBS casemaster waaaaaay back. Just felt cheap, and that bushing neck thickness thing had way too much play for my liking. It just felt like it was built by the lowest bidder. I did verify the case thickness throughout the case with the RCBS tool though. I modified a bar to fit in the tool similiar to the case head separation bar (just long enough to fit in the neck and still make contact with the inside of the brass) and found thick/thin sides consistently down the length of the cases at the same spot represented on the neck. This is fact. And the banana case theory has quite a bit of discussion/research as well. This theory's effects are mostly negated "IF" you sort by neck variation. I still index my cases squarely behind the recoil lug (which makes no sense) but I guess I do this because it is consistent. I think in the car too. Hope we all never meet while driving or we may CRASH!!! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
To turn or not (necks)
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