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Rifles, Reloading, Optics, Equipment
Reloading
Lowering ES 260 REM load
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<blockquote data-quote="Mikecr" data-source="post: 1682298" data-attributes="member: 1521"><p>293 bushing to 263 neck IDs, means the necks would have to be >15thou thick. </p><p>Are they?</p><p>So you're not developing a load, but merely piddling with groups at different charges -from virgin brass. With this, don't you think everything is changing and unstable?</p><p>Also, shoulder bumping is not taken to new brass dimensions, it's taken from chamber fit.</p><p>You should do Berger's recommended full seating testing, and when your brass is fully fire-formed and stable, begin <u>actual</u> load development.</p><p>See where it goes from there</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1682298, member: 1521"] 293 bushing to 263 neck IDs, means the necks would have to be >15thou thick. Are they? So you're not developing a load, but merely piddling with groups at different charges -from virgin brass. With this, don't you think everything is changing and unstable? Also, shoulder bumping is not taken to new brass dimensions, it's taken from chamber fit. You should do Berger's recommended full seating testing, and when your brass is fully fire-formed and stable, begin [U]actual[/U] load development. See where it goes from there [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Lowering ES 260 REM load
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