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Rifles, Reloading, Optics, Equipment
Reloading
how do you guys choose your seating depth
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<blockquote data-quote="bruce_ventura" data-source="post: 1097356" data-attributes="member: 34084"><p>I run a string of increasing charges (.5 gr increments) from a starting charge that is about half-way between book min and max, looking for nodes in impact location, and pressure signs. I start with .020" off lands. If no joy, I repeat with bullets touching lands. Then .040", .060", etc. </p><p></p><p>Usually the results of those strings suggest a good load to start exploring group size. I change the load in increments of .3 gr charge and .010" COAL. If the load is for long range (>500 yds), then I measure MV ES at the same time as I measure group size. I'm looking for the charge and COAL that minimizes both. </p><p></p><p>Also, I fire 5 shot groups for each charge/COAL. It's too easy to get misled by 3-shot spreads that are way below or above average.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 1097356, member: 34084"] I run a string of increasing charges (.5 gr increments) from a starting charge that is about half-way between book min and max, looking for nodes in impact location, and pressure signs. I start with .020" off lands. If no joy, I repeat with bullets touching lands. Then .040", .060", etc. Usually the results of those strings suggest a good load to start exploring group size. I change the load in increments of .3 gr charge and .010" COAL. If the load is for long range (>500 yds), then I measure MV ES at the same time as I measure group size. I'm looking for the charge and COAL that minimizes both. Also, I fire 5 shot groups for each charge/COAL. It's too easy to get misled by 3-shot spreads that are way below or above average. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
how do you guys choose your seating depth
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