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Rifles, Reloading, Optics, Equipment
Reloading
New brass prep?
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<blockquote data-quote="Derek M." data-source="post: 216793" data-attributes="member: 2693"><p><strong>Here's what I do...</strong></p><p></p><p>Inspect cases for defects. Any brand can have them.</p><p></p><p>Run all cases into a sizer die to uniform the necks. Trim all cases to same length and chamfer. On my RCBS case prep station, I use regular bronze brushes for bore scrubbing and put one in the prep station. I scrub the inside of the necks for about 10 seconds each with the rotating brush to get out any factory coating or debris. Deburr flash-hole, not really necessary with Lapua. If you use an expander when sizing, then I would recommend you scrub inside case neck as step 1. The only time I use one is if the case necks are slightly dented. Then I size twice. Once with expander to uniform outside and inside, then again without expander. Then trim. </p><p></p><p>Run all new cases on concentricity gauge and separate into batches based on apparent run-out. Up to .002 is tier 1, .003-.004 is tier 2. Any more than that and they are for play, fouling, barrel break-in, etc. Granted, you will have some aberrant findings due to the cases being unfired and asymmetric case wall thickness anyway, so I do double check all after first firing and re-segregate.</p><p></p><p>Norma and Lapua brass I do not mess with primer pocket. Lesser brass, I will, if I'm not too lazy.</p></blockquote><p></p>
[QUOTE="Derek M., post: 216793, member: 2693"] [b]Here's what I do...[/b] Inspect cases for defects. Any brand can have them. Run all cases into a sizer die to uniform the necks. Trim all cases to same length and chamfer. On my RCBS case prep station, I use regular bronze brushes for bore scrubbing and put one in the prep station. I scrub the inside of the necks for about 10 seconds each with the rotating brush to get out any factory coating or debris. Deburr flash-hole, not really necessary with Lapua. If you use an expander when sizing, then I would recommend you scrub inside case neck as step 1. The only time I use one is if the case necks are slightly dented. Then I size twice. Once with expander to uniform outside and inside, then again without expander. Then trim. Run all new cases on concentricity gauge and separate into batches based on apparent run-out. Up to .002 is tier 1, .003-.004 is tier 2. Any more than that and they are for play, fouling, barrel break-in, etc. Granted, you will have some aberrant findings due to the cases being unfired and asymmetric case wall thickness anyway, so I do double check all after first firing and re-segregate. Norma and Lapua brass I do not mess with primer pocket. Lesser brass, I will, if I'm not too lazy. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
New brass prep?
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