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Rifles, Reloading, Optics, Equipment
Reloading
GUESS WHAT!
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<blockquote data-quote="Hugnot" data-source="post: 2488531" data-attributes="member: 115658"><p>Are the squirrels black or do they climb on black trees?</p><p></p><p>My thinking is that there are many other variables that would affect MV in addition to powder charge variations. I would attempt to anaylze group shape in an effort to predict (confidence levels) divergence at range increments. A read of the Berger manual, pages 140 - 147 gets into statistical analysis of targets. The graph shown in page 142, frequency distribution - (bell shaped curve - remember when smart guys had test scores on right side, the majority in upper middle, & struggling students on left side (D's & F's)) The illustration on page 144 shows a shot up target with circles representing confidence intervals with group center indicated as +.</p><p></p><p>Quote, page 144 - "Note that if the vertical SD & horizontal SD are significantly different from each other, you could chose to apply them independently. which would result in ellipses instead of circles." Taking a look at the orientation of an ellipsoidal display of confidence intervals it would be possible to get an idea of the confidence levels of either up/down (Y) or left/right(X) hits at extended ranges. An evaluation of confidence levels using data with extreme powder measurement accuracy would give some idea of the validity of extreme powder measurements - all other factors would be operational. Bulk data.</p><p></p><p>I remember back then, in a 12th grade calc class, our crafty teacher took our quarterly exam booklets and neatly stacked them in a pile. He then said " how about I grade these this way" ?, he then tossed the whole works (overhand toss, edge forward) up a flight of enclosed stairs in the back of the class room. A blast of paper flew at the stairs. a few books reached the top, the bulk of books landed in mid level, and a few were at the bottom. The good (serious) students were horrified. I thought it was funny.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2488531, member: 115658"] Are the squirrels black or do they climb on black trees? My thinking is that there are many other variables that would affect MV in addition to powder charge variations. I would attempt to anaylze group shape in an effort to predict (confidence levels) divergence at range increments. A read of the Berger manual, pages 140 - 147 gets into statistical analysis of targets. The graph shown in page 142, frequency distribution - (bell shaped curve - remember when smart guys had test scores on right side, the majority in upper middle, & struggling students on left side (D's & F's)) The illustration on page 144 shows a shot up target with circles representing confidence intervals with group center indicated as +. Quote, page 144 - "Note that if the vertical SD & horizontal SD are significantly different from each other, you could chose to apply them independently. which would result in ellipses instead of circles." Taking a look at the orientation of an ellipsoidal display of confidence intervals it would be possible to get an idea of the confidence levels of either up/down (Y) or left/right(X) hits at extended ranges. An evaluation of confidence levels using data with extreme powder measurement accuracy would give some idea of the validity of extreme powder measurements - all other factors would be operational. Bulk data. I remember back then, in a 12th grade calc class, our crafty teacher took our quarterly exam booklets and neatly stacked them in a pile. He then said " how about I grade these this way" ?, he then tossed the whole works (overhand toss, edge forward) up a flight of enclosed stairs in the back of the class room. A blast of paper flew at the stairs. a few books reached the top, the bulk of books landed in mid level, and a few were at the bottom. The good (serious) students were horrified. I thought it was funny. [/QUOTE]
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