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Rifles, Reloading, Optics, Equipment
Reloading
HELP WITH SATERLEE VELOCITY TEST
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<blockquote data-quote="entoptics" data-source="post: 1957440" data-attributes="member: 104268"><p>I've simulated a OCW/Satterlee/Ladder test in the graph below. I used Excel to randomly generate a velocity within the normal distribution one would expect with a muzzle velocity standard deviation of 10 fps. To get the velocity at each charge weight, I took the OP's data and regressed a line through it, which came out to a slope of 55 fps per grain of powder. I then used the OP's 0.2 grain charge increment to calculate the nominal velocity at each increment, applied the random variation, and ran the simulation 4 times.</p><p></p><p>I circled all the "nodes" for emphasis...</p><p></p><p>So...see if you can pick out the OP's data from the randomly generated data...</p><p></p><p>[ATTACH=full]207777[/ATTACH]</p><p></p><p></p><p>If it's not clear, OCW/Ladder/Satterlee etc are usually an exercise in interpreting random noise (seeing faces in clouds or reading tea leaves). It's plausible that they may have some merit for the absolutely most precise ammunition and rifles, or perhaps if one were to fire 10 shots at each charge weight to achieve reasonable statistics.</p></blockquote><p></p>
[QUOTE="entoptics, post: 1957440, member: 104268"] I've simulated a OCW/Satterlee/Ladder test in the graph below. I used Excel to randomly generate a velocity within the normal distribution one would expect with a muzzle velocity standard deviation of 10 fps. To get the velocity at each charge weight, I took the OP's data and regressed a line through it, which came out to a slope of 55 fps per grain of powder. I then used the OP's 0.2 grain charge increment to calculate the nominal velocity at each increment, applied the random variation, and ran the simulation 4 times. I circled all the "nodes" for emphasis... So...see if you can pick out the OP's data from the randomly generated data... [ATTACH type="full"]207777[/ATTACH] If it's not clear, OCW/Ladder/Satterlee etc are usually an exercise in interpreting random noise (seeing faces in clouds or reading tea leaves). It's plausible that they may have some merit for the absolutely most precise ammunition and rifles, or perhaps if one were to fire 10 shots at each charge weight to achieve reasonable statistics. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
HELP WITH SATERLEE VELOCITY TEST
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