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Rifles, Reloading, Optics, Equipment
Reloading
HELP WITH SATERLEE VELOCITY TEST
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<blockquote data-quote="User4302021" data-source="post: 1958568" data-attributes="member: 105322"><p>Funny you should mention that.</p><p></p><p>After going down all these rabbit holes myself, I have greatly abbreviated my process.</p><p></p><p>I start about book middle for initial charge weight, I load 5 each at 1% intervals until I find pressure primarily using velocity, as well as pressure ring expansion, appearance and position of soot on neck, primer appearance, bolt lift, etc...</p><p></p><p>I back off 2% from this point and shoot 4 more groups of 5 shots using max- 2%, -1.5%, -1%, -0.5%. I shoot these at 200 yards.</p><p></p><p>The group centers will very typically trend up or down just like they do in a true ladder or OCW test. So, being a believer in positive compensation, I try to choose the one striking highest above POA.</p><p></p><p>I dial it in with seating depth and I'm done.</p><p></p><p>I don't care if a load groups at 100fps below my target velocity, and I don't care if it groups at max pressure when it is 40 degrees outside.</p><p></p><p>There is a very narrow acceptable velocity window that is full speed, and as clean and consistent as it is gonna be. The 4 charge weights listed above cover that exact territory. Why mess around with any other area?</p></blockquote><p></p>
[QUOTE="User4302021, post: 1958568, member: 105322"] Funny you should mention that. After going down all these rabbit holes myself, I have greatly abbreviated my process. I start about book middle for initial charge weight, I load 5 each at 1% intervals until I find pressure primarily using velocity, as well as pressure ring expansion, appearance and position of soot on neck, primer appearance, bolt lift, etc... I back off 2% from this point and shoot 4 more groups of 5 shots using max- 2%, -1.5%, -1%, -0.5%. I shoot these at 200 yards. The group centers will very typically trend up or down just like they do in a true ladder or OCW test. So, being a believer in positive compensation, I try to choose the one striking highest above POA. I dial it in with seating depth and I'm done. I don't care if a load groups at 100fps below my target velocity, and I don't care if it groups at max pressure when it is 40 degrees outside. There is a very narrow acceptable velocity window that is full speed, and as clean and consistent as it is gonna be. The 4 charge weights listed above cover that exact territory. Why mess around with any other area? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
HELP WITH SATERLEE VELOCITY TEST
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