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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Experiment for quantifying lot to lot variations of powders
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<blockquote data-quote="rscott5028" data-source="post: 683125" data-attributes="member: 24624"><p>Michael, </p><p> </p><p>I look forward to reading about your results. </p><p> </p><p>A few considerations for this or future experiments... </p><p> </p><p>10 is a pretty small sample. </p><p> </p><p>Perhaps test in parallel with 3 different rifles? </p><p> </p><p>Shoulder fired weapons are said to show different MV depending on individual shooter technique. Perhaps use a lead sled or machine rest? </p><p> </p><p>Certainly you would use cartridges for which the powder is intended. But h4831sc is known to work for many cartridges. Are the results the same regardless of which cartridge (capacity and/or case fill ratio within reason) is tested? </p><p> </p><p>Are the results consistent with minimum, moderate, and maximum loads? </p><p> </p><p>Are the results consistent with light, medium, or heavy bullets? </p><p> </p><p>Does it matter if the load has been optimized for consistent MV? </p><p> </p><p>Isolate temp, atmospheric and other external conditions. </p><p> </p><p>Does chamber pressure track consistent with MV for this experiment? </p><p> </p><p>Are the initial fouling shots statistically different than the rest? </p><p> </p><p>Are all canisters of the same lot # the same? </p><p> </p><p>Are all Hodgdon Extreme powders equally consistent? </p><p> </p><p>Are Hodgdon Extreme powders more consistent than other powders that do or don't make similar claims? </p><p> </p><p>I suppose you need to narrow down the number variables in order to have a manageable experiment. But, my concern would be whether or not your conclusions would be the consistent for all conditions rather than just assuming that to be the case. </p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 683125, member: 24624"] Michael, I look forward to reading about your results. A few considerations for this or future experiments... 10 is a pretty small sample. Perhaps test in parallel with 3 different rifles? Shoulder fired weapons are said to show different MV depending on individual shooter technique. Perhaps use a lead sled or machine rest? Certainly you would use cartridges for which the powder is intended. But h4831sc is known to work for many cartridges. Are the results the same regardless of which cartridge (capacity and/or case fill ratio within reason) is tested? Are the results consistent with minimum, moderate, and maximum loads? Are the results consistent with light, medium, or heavy bullets? Does it matter if the load has been optimized for consistent MV? Isolate temp, atmospheric and other external conditions. Does chamber pressure track consistent with MV for this experiment? Are the initial fouling shots statistically different than the rest? Are all canisters of the same lot # the same? Are all Hodgdon Extreme powders equally consistent? Are Hodgdon Extreme powders more consistent than other powders that do or don't make similar claims? I suppose you need to narrow down the number variables in order to have a manageable experiment. But, my concern would be whether or not your conclusions would be the consistent for all conditions rather than just assuming that to be the case. -- richard [/QUOTE]
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Experiment for quantifying lot to lot variations of powders
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