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Rifles, Reloading, Optics, Equipment
Reloading
Standard Deviation
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<blockquote data-quote="Hugnot" data-source="post: 2639998" data-attributes="member: 115658"><p>I like to play around with stat stuff. Should I be responsible for producing vast quantities of ammo for certain endeavors like military or demanding commercial use I would insist on preforming a stat analysis on each ammo lot. Ammo lots that exceeded reasonable stats for the intended use would undergo additional testing.</p><p></p><p>How that ammo lot was used would be beyond my control and any value prediction based on exemplary SD data could be negated by limitless use variations.</p><p></p><p>For my use, knowing environmental conditions, bore condition, component variations and target demands having an ammo lot of 250 - 500 rounds with SD values between 20-35 fps is more than adequate. I usually pull 10-20 rounds at random from the ammo lot for chrony data, get SD then get low/high estimates at each 2 1/2 % tail (95% probability) of normal distribution. T .05, two tails.</p><p> </p><p>Talking about glop in bores, wind, and non-stat stuff is another subject.</p><p></p><p>Should I go out to make that first shot count, if possible, I fire 2-3 fouling shots thru a clean bore. Stat data collection is from cool (ambient temperatures) but fouled bores. Like drive out to shoot that trophy rodent with a slightly fouled bore. Clean the bore at the range then shoot 2-3 more.[ATTACH]401744[/ATTACH]</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2639998, member: 115658"] I like to play around with stat stuff. Should I be responsible for producing vast quantities of ammo for certain endeavors like military or demanding commercial use I would insist on preforming a stat analysis on each ammo lot. Ammo lots that exceeded reasonable stats for the intended use would undergo additional testing. How that ammo lot was used would be beyond my control and any value prediction based on exemplary SD data could be negated by limitless use variations. For my use, knowing environmental conditions, bore condition, component variations and target demands having an ammo lot of 250 - 500 rounds with SD values between 20-35 fps is more than adequate. I usually pull 10-20 rounds at random from the ammo lot for chrony data, get SD then get low/high estimates at each 2 1/2 % tail (95% probability) of normal distribution. T .05, two tails. Talking about glop in bores, wind, and non-stat stuff is another subject. Should I go out to make that first shot count, if possible, I fire 2-3 fouling shots thru a clean bore. Stat data collection is from cool (ambient temperatures) but fouled bores. Like drive out to shoot that trophy rodent with a slightly fouled bore. Clean the bore at the range then shoot 2-3 more.[ATTACH alt="Screenshot (492).png"]401744[/ATTACH] [/QUOTE]
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Reloading
Standard Deviation
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