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Rifles, Reloading, Optics, Equipment
Reloading
Weighing Powder - How precise is good enough?
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<blockquote data-quote="Mikecr" data-source="post: 533705" data-attributes="member: 1521"><p>Well given that this is a 'long range hunting' site there is still ES to be considered HERE.</p><p>There are tolerant cartridge/load combinations(OCW), but often they are less than suitable over a range of distances. They can produce tiny little short range groups, and suck to hell for distant accuracy, unless also benefiting with low ES.</p><p>Afterall, barrel timing and velocity are two different things that don't hold a linear relationship.</p><p></p><p>You can hit on barrel timing that provides exceptional velocity tolerance -at one distance. An upswung muzzle at a lower velocity, etc.</p><p>But this would prove to be a wreck at some other distances, and it would also require a tight charge tolerance and shooting condition(or tuner) to hold.</p><p>Many competitors have seen that load development for this timing -at their intended range, is worthwhile.</p><p></p><p>Now with LR hunting cartridges it is even more difficult to get a velocity tolerant load AND low ES. Our ranges are not set, our muzzles move a lot, and our powders & pressures are relatively slow & low. </p><p>So tight tolerances on charge weight(w/resp to capacity) isn't a bad idea.</p><p></p><p>David Tubb implied benefits to charges taken to the granule with his 6xc, and he promoted use of Prometheus(which does).</p></blockquote><p></p>
[QUOTE="Mikecr, post: 533705, member: 1521"] Well given that this is a 'long range hunting' site there is still ES to be considered HERE. There are tolerant cartridge/load combinations(OCW), but often they are less than suitable over a range of distances. They can produce tiny little short range groups, and suck to hell for distant accuracy, unless also benefiting with low ES. Afterall, barrel timing and velocity are two different things that don't hold a linear relationship. You can hit on barrel timing that provides exceptional velocity tolerance -at one distance. An upswung muzzle at a lower velocity, etc. But this would prove to be a wreck at some other distances, and it would also require a tight charge tolerance and shooting condition(or tuner) to hold. Many competitors have seen that load development for this timing -at their intended range, is worthwhile. Now with LR hunting cartridges it is even more difficult to get a velocity tolerant load AND low ES. Our ranges are not set, our muzzles move a lot, and our powders & pressures are relatively slow & low. So tight tolerances on charge weight(w/resp to capacity) isn't a bad idea. David Tubb implied benefits to charges taken to the granule with his 6xc, and he promoted use of Prometheus(which does). [/QUOTE]
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Weighing Powder - How precise is good enough?
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