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Rifles, Reloading, Optics, Equipment
Reloading
QL and why or GRT
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<blockquote data-quote="Dancin&#039; Crosshairs" data-source="post: 2714976" data-attributes="member: 26069"><p>So...for those who say a precise prediction can be had using either Quickload or GRT, maybe you can explain this to me:</p><p></p><p>I have used both extensively.</p><p></p><p>Ba can be adjusted in either program to precisely match Labradar results. Wonderful.</p><p></p><p>The problem is that the Ba value used may seem to work well for one cartridge, but when the powder and the Ba value is used for a completely different cartridge the computed results are nowhere near real world results. The truth is, the default weighting factor (Siebert factor in GRT) value in these programs is not precise at all, they're just ballpark figures. The same can be said for Start Pressure values. These inputs all interact with the solution, and the values have effects on computed solutions every bit as significant as Ba.</p><p></p><p>I have not been able to begin imagining a method for determining precise inputs for these three parameters so that the Ba for a given lot of powder is known to be precisely correct. </p><p></p><p>If someone KNOWS, I'm all ears (or eyes). "Good enough" guesses are of NO use.</p></blockquote><p></p>
[QUOTE="Dancin' Crosshairs, post: 2714976, member: 26069"] So...for those who say a precise prediction can be had using either Quickload or GRT, maybe you can explain this to me: I have used both extensively. Ba can be adjusted in either program to precisely match Labradar results. Wonderful. The problem is that the Ba value used may seem to work well for one cartridge, but when the powder and the Ba value is used for a completely different cartridge the computed results are nowhere near real world results. The truth is, the default weighting factor (Siebert factor in GRT) value in these programs is not precise at all, they're just ballpark figures. The same can be said for Start Pressure values. These inputs all interact with the solution, and the values have effects on computed solutions every bit as significant as Ba. I have not been able to begin imagining a method for determining precise inputs for these three parameters so that the Ba for a given lot of powder is known to be precisely correct. If someone KNOWS, I'm all ears (or eyes). "Good enough" guesses are of NO use. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
QL and why or GRT
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