#11
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If you simply run an inside reamer into the neck of the case, you will remove the same amount of brass all the way around, leaving the case neck still thicker on one side than the other. Case necks that are thicker on one side, will hold the bullet in a different relationship to the bore, depending on where the thicker part is, each time a round is fired. Thus, outside neck turning is the only way to have concentric necks. Some brass is better than others. Lapua comes to mind, but I had some .220 Swift RP brass years ago that was almost perfect, right down to 1.2" from the case mouth, the most it was out was .001".
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Daryl Last edited by Daryl; 04-23-2019 at 04:17 PM. |
#12
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Thank you for the explanation. I was planning to neck turn to reduce irregularity of wall thickness/neck tension. |
#13
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Good move.
As well, you can 'tailer' the brass to have whatever neck wall you want, to reduce expansion,sizing differences, which will extend case neck life.
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Daryl |
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