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Rifles, Reloading, Optics, Equipment
Reloading
powder charge vs velocity
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<blockquote data-quote="brentc" data-source="post: 654701" data-attributes="member: 16938"><p>This particular instance does raise flags of something going wrong with the chronograph because of the amount of declining velocity. I'd guess changing light conditions affecting the chronograph. More testing will tell you what's actually happening.</p><p> </p><p>I've seen it many times that if you map your velocities with a particular powder combination, you can see a steady rise in velocity with powder increase, usually linear. As you start reaching the maximum powder charge the velocity per powder increment begins to decrease until you reach the point of diminishing returns and the velocity begins to decline as you exceed the maximum charge. Some combinations show pressure signs before the point is reached, and some combinations show a distinct velocity curve slightly before or right along with traditional pressure signs.</p></blockquote><p></p>
[QUOTE="brentc, post: 654701, member: 16938"] This particular instance does raise flags of something going wrong with the chronograph because of the amount of declining velocity. I'd guess changing light conditions affecting the chronograph. More testing will tell you what's actually happening. I've seen it many times that if you map your velocities with a particular powder combination, you can see a steady rise in velocity with powder increase, usually linear. As you start reaching the maximum powder charge the velocity per powder increment begins to decrease until you reach the point of diminishing returns and the velocity begins to decline as you exceed the maximum charge. Some combinations show pressure signs before the point is reached, and some combinations show a distinct velocity curve slightly before or right along with traditional pressure signs. [/QUOTE]
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powder charge vs velocity
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