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Rifles, Reloading, Optics, Equipment
Reloading
Slower Burning Powders ranked numerically by burn rate
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<blockquote data-quote="Veteran" data-source="post: 2809041" data-attributes="member: 118038"><p>To get really technical the units of BA are 1/Bar</p><p></p><p>And its the measure of the burn rate of the outer layer of powder as combustion iniates.</p><p></p><p>It gets multiplied by the heat of explosion, the specific heat ratio, a degradation factor, and the density of the powder to generate a curve showing in milliseconds how the explosion generates using that powder.</p><p></p><p>Yes every powder is different in its granularity and density and other chemical properties, so even 2 powders like IMR 8133 and N568 having the identical BA of .3 wont react completely identically, but they will be very very close.</p><p></p><p>These factors for each powder are derived by exploding equal volumes of powder in a pressure bomb at same temperature. Equal pressure, temp and volume and with sophisticated instruments determing burn rate, how fast the reaction begins, and how fast it ends in milli seconds.</p><p></p><p>Something like that.</p></blockquote><p></p>
[QUOTE="Veteran, post: 2809041, member: 118038"] To get really technical the units of BA are 1/Bar And its the measure of the burn rate of the outer layer of powder as combustion iniates. It gets multiplied by the heat of explosion, the specific heat ratio, a degradation factor, and the density of the powder to generate a curve showing in milliseconds how the explosion generates using that powder. Yes every powder is different in its granularity and density and other chemical properties, so even 2 powders like IMR 8133 and N568 having the identical BA of .3 wont react completely identically, but they will be very very close. These factors for each powder are derived by exploding equal volumes of powder in a pressure bomb at same temperature. Equal pressure, temp and volume and with sophisticated instruments determing burn rate, how fast the reaction begins, and how fast it ends in milli seconds. Something like that. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Slower Burning Powders ranked numerically by burn rate
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