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Rifles, Reloading, Optics, Equipment
Reloading
NODES _ Ladder test
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<blockquote data-quote="Bart B" data-source="post: 1164600" data-attributes="member: 5302"><p>Here's a spreadsheet showing what a charge difference will be for a .243 bullet leaving about 2800 fps and 2821 fps with 3/10ths grain more powder. Each tenth of a grain increases muzzle velocity about 7 fps.</p><p></p><p><img src="http://i735.photobucket.com/albums/ww351/BartBob/24320Win20Bullet20Paths.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>My concern is, at 300 yards with a .4 in difference in bullet drop between 2800 and 2821 fps muzzle velocity, what does the accuracy of that load have to be to resolve a .4 inch difference in group center of a 5-shot test of that load's accuracy to start with? What if its muzzle velocity spread is 30 fps?</p></blockquote><p></p>
[QUOTE="Bart B, post: 1164600, member: 5302"] Here's a spreadsheet showing what a charge difference will be for a .243 bullet leaving about 2800 fps and 2821 fps with 3/10ths grain more powder. Each tenth of a grain increases muzzle velocity about 7 fps. [IMG]http://i735.photobucket.com/albums/ww351/BartBob/24320Win20Bullet20Paths.jpg[/IMG] My concern is, at 300 yards with a .4 in difference in bullet drop between 2800 and 2821 fps muzzle velocity, what does the accuracy of that load have to be to resolve a .4 inch difference in group center of a 5-shot test of that load's accuracy to start with? What if its muzzle velocity spread is 30 fps? [/QUOTE]
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NODES _ Ladder test
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