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Rifles, Reloading, Optics, Equipment
Reloading
"scoring?" on 308 brass after sizing?
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<blockquote data-quote="boomtube" data-source="post: 871985" data-attributes="member: 9215"><p>There's enough variation in dies, shell holders, brass spring back and chambers that all any die instructions can do, or hope to do, is allow noobs to make ammo that will chamber and fire. Passed that, it's up to the user to understand what he's doing and adjust the dies for best effect.</p><p> </p><p>It's possible but rare to be able to neck size in an FL die, that's why neck sizers are sold. Using any conventional sizer without lube is a mistake because of brass galling onto the die. We can't use enough lube in a neck die to cause any problems. Neck sizing rerely makes much difference in accuracy. Or case life, because most cases fail due to neck splits anyway.</p><p> </p><p>I hate the loosely tossed around term of "partial" FL sizing; it means nothing. If a case is sized to properly fit it's chamber it's fully resized. It's "partial" sizing only in that the cases aren't fully jammed into the die as far as possible and that's usually over resized.</p><p> </p><p>You can "measure" shoulder set back in your bolt rifle the old way, adjusting the sizer down in small changes enough to permit the bolt to smoothly close on empty cases and no more. Small die changes mean just that, a few degrees at a time. The oft suggested "small'" quarter die turn is massive, that will move a die about 16 thou, being nearly 3 times more than the normal min:max bottle neck shoulder tolerence of about 6 thou.</p><p> </p><p>There are several precision shoulder gages helpful for setting sizer dies but perhaps the "best", over all, is the modest priced Hornady "Case Headspace" device that clamps on the jaws of your dial caliper. (It also accepts accessory tools that allow it to measure seated bullet depth on the loaded cartridge's ogive.)</p></blockquote><p></p>
[QUOTE="boomtube, post: 871985, member: 9215"] There's enough variation in dies, shell holders, brass spring back and chambers that all any die instructions can do, or hope to do, is allow noobs to make ammo that will chamber and fire. Passed that, it's up to the user to understand what he's doing and adjust the dies for best effect. It's possible but rare to be able to neck size in an FL die, that's why neck sizers are sold. Using any conventional sizer without lube is a mistake because of brass galling onto the die. We can't use enough lube in a neck die to cause any problems. Neck sizing rerely makes much difference in accuracy. Or case life, because most cases fail due to neck splits anyway. I hate the loosely tossed around term of "partial" FL sizing; it means nothing. If a case is sized to properly fit it's chamber it's fully resized. It's "partial" sizing only in that the cases aren't fully jammed into the die as far as possible and that's usually over resized. You can "measure" shoulder set back in your bolt rifle the old way, adjusting the sizer down in small changes enough to permit the bolt to smoothly close on empty cases and no more. Small die changes mean just that, a few degrees at a time. The oft suggested "small'" quarter die turn is massive, that will move a die about 16 thou, being nearly 3 times more than the normal min:max bottle neck shoulder tolerence of about 6 thou. There are several precision shoulder gages helpful for setting sizer dies but perhaps the "best", over all, is the modest priced Hornady "Case Headspace" device that clamps on the jaws of your dial caliper. (It also accepts accessory tools that allow it to measure seated bullet depth on the loaded cartridge's ogive.) [/QUOTE]
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"scoring?" on 308 brass after sizing?
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