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Rifles, Reloading, Optics, Equipment
Reloading
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<blockquote data-quote="Mikecr" data-source="post: 2450216" data-attributes="member: 1521"><p>It's not estimated or calculated.</p><p>It's just a baseline to efficiency, and I imagine it's built into many of QL's calcs.</p><p>For different preloaded cartridges they've tweaked it to provide a better baseline, likely as observed.</p><p>The intelligent person behind the QL curtain for sure knew that there are practically infinite combinations of individual factors affecting this outcome. Some of which could not be known at the time, or the near future.</p><p></p><p>Like if I reach back to a Gibbs design and built front ignition into a 30-06, and then went Ackley on it to reduce body taper, and increase shoulder angle. Then for the heck of it, I add neck length. The capacity of this wildcat can exactly equal that of a standard 30-06 if I choose, but you can bet the muzzle velocity will be way different. The weighting factor would have to be tweaked to account for all this, and allow calibration. It's not a problem that my 30thing wildcat is not on their drop down list.</p><p></p><p>I'll add something else I've learned. You can tell that you have a weighting factor mismatch because it's the only term to cause a pressure and velocity counter, rather than directly following. As OP pointed out, a higher weighting factor causes pressure to go up AND velocity to go down.</p><p>If you have a well designed gun and you do pressure testing with webline measure, you can determine when you've hit SAAMI max.</p><p>If right there you didn't expect max pressure AND your velocity is reading a bit low (like 50fps) for that pressure, then you can tweak WF to nail your situation. That's good learning, as it saves tail chasing with other guessing of parameters.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2450216, member: 1521"] It's not estimated or calculated. It's just a baseline to efficiency, and I imagine it's built into many of QL's calcs. For different preloaded cartridges they've tweaked it to provide a better baseline, likely as observed. The intelligent person behind the QL curtain for sure knew that there are practically infinite combinations of individual factors affecting this outcome. Some of which could not be known at the time, or the near future. Like if I reach back to a Gibbs design and built front ignition into a 30-06, and then went Ackley on it to reduce body taper, and increase shoulder angle. Then for the heck of it, I add neck length. The capacity of this wildcat can exactly equal that of a standard 30-06 if I choose, but you can bet the muzzle velocity will be way different. The weighting factor would have to be tweaked to account for all this, and allow calibration. It's not a problem that my 30thing wildcat is not on their drop down list. I'll add something else I've learned. You can tell that you have a weighting factor mismatch because it's the only term to cause a pressure and velocity counter, rather than directly following. As OP pointed out, a higher weighting factor causes pressure to go up AND velocity to go down. If you have a well designed gun and you do pressure testing with webline measure, you can determine when you've hit SAAMI max. If right there you didn't expect max pressure AND your velocity is reading a bit low (like 50fps) for that pressure, then you can tweak WF to nail your situation. That's good learning, as it saves tail chasing with other guessing of parameters. [/QUOTE]
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