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Rifles, Reloading, Optics, Equipment
Reloading
Powder charge and seating depth
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<blockquote data-quote="QuietTexan" data-source="post: 2436106" data-attributes="member: 116181"><p>There's no single way that works best per se, if it works it works. Some processes are more deliberate though, and use fewer components. It seems like people earlier were talking about parts of the process and not the whole thing though.</p><p></p><p>I personally have been using:</p><ol> <li data-xf-list-type="ol">Coarse seating Depth<ol> <li data-xf-list-type="ol">Typically start at 0.020" off, back out in 0.040" increment (if needed, honestly for comp rifles where I single feed anyways I typically start here and don't do coarse testing unless 0.020" off doesn't work)</li> <li data-xf-list-type="ol">Include book COL in the test if it's way short</li> <li data-xf-list-type="ol">Look for overall group, specifically horizontal dispersion</li> </ol></li> <li data-xf-list-type="ol">Charge Weight<ol> <li data-xf-list-type="ol">Typically shoot at 100-200-300 yards with a chrono</li> <li data-xf-list-type="ol">Look for minimal vertical dispersion (hopefully maintaining horizontal)</li> <li data-xf-list-type="ol">Look for chrono flat spots</li> <li data-xf-list-type="ol">Look for overlaps between the two (change powder here if needed)</li> </ol></li> <li data-xf-list-type="ol">Fine tune seating Depth<ol> <li data-xf-list-type="ol">0.002" to 0.004" increments around the coarse depth (depending on how tight the coarse depth was and far I need to go)</li> <li data-xf-list-type="ol">Confirm fine tune seating doesn't wreck the vertical/muzzle stats</li> </ol></li> <li data-xf-list-type="ol">Tuner <ol> <li data-xf-list-type="ol">Pick a bad part of the ladder and reshoot to see if the tuner moves the groups</li> <li data-xf-list-type="ol">If it does, take the tuned setting and run the load from #3</li> <li data-xf-list-type="ol">Tweak if needed </li> </ol></li> </ol><p></p><p>There are different seating depth testing processes being discussed here potentially because there's not a lot of details being provided. As many methods as I can think of off the top of my head in in a minute:</p><ol> <li data-xf-list-type="ol">Start at X.xxx" off and back up at 0.xxx"</li> <li data-xf-list-type="ol">Start at 0.000" or some jam and back off</li> <li data-xf-list-type="ol">The Berger "Big Jump" Method - 4 intervals that are 0.040-0.050" off, then fine tune</li> <li data-xf-list-type="ol">Start at mag length and back off 0.xxx"</li> <li data-xf-list-type="ol">Use book COL</li> <li data-xf-list-type="ol">Seat bullet base to neck junction</li> <li data-xf-list-type="ol">Seat to a cannelure</li> </ol></blockquote><p></p>
[QUOTE="QuietTexan, post: 2436106, member: 116181"] There's no single way that works best per se, if it works it works. Some processes are more deliberate though, and use fewer components. It seems like people earlier were talking about parts of the process and not the whole thing though. I personally have been using: [LIST=1] [*]Coarse seating Depth [LIST=1] [*]Typically start at 0.020" off, back out in 0.040" increment (if needed, honestly for comp rifles where I single feed anyways I typically start here and don't do coarse testing unless 0.020" off doesn't work) [*]Include book COL in the test if it's way short [*]Look for overall group, specifically horizontal dispersion [/LIST] [*]Charge Weight [LIST=1] [*]Typically shoot at 100-200-300 yards with a chrono [*]Look for minimal vertical dispersion (hopefully maintaining horizontal) [*]Look for chrono flat spots [*]Look for overlaps between the two (change powder here if needed) [/LIST] [*]Fine tune seating Depth [LIST=1] [*]0.002" to 0.004" increments around the coarse depth (depending on how tight the coarse depth was and far I need to go) [*]Confirm fine tune seating doesn't wreck the vertical/muzzle stats [/LIST] [*]Tuner [LIST=1] [*]Pick a bad part of the ladder and reshoot to see if the tuner moves the groups [*]If it does, take the tuned setting and run the load from #3 [*]Tweak if needed [/LIST] [/LIST] There are different seating depth testing processes being discussed here potentially because there's not a lot of details being provided. As many methods as I can think of off the top of my head in in a minute: [LIST=1] [*]Start at X.xxx" off and back up at 0.xxx" [*]Start at 0.000" or some jam and back off [*]The Berger "Big Jump" Method - 4 intervals that are 0.040-0.050" off, then fine tune [*]Start at mag length and back off 0.xxx" [*]Use book COL [*]Seat bullet base to neck junction [*]Seat to a cannelure [/LIST] [/QUOTE]
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Powder charge and seating depth
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