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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How close is the cosign rule in slope shooting?
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<blockquote data-quote="User4302021" data-source="post: 1986935" data-attributes="member: 105322"><p>I don't know what data was used to generate those charts, but here it is from JBM:</p><p></p><p>308 w/175 SMK @ 2630 fps @ 2000 ft elevation:</p><p>600 yard flat drop in inches = 15.1 MOA = -95" drop</p><p></p><p>600 yards, -30* slope RR = 519 yards = -64.5" drop</p><p></p><p>600 yards, -30* slope IRR = 13 MOA = -81.6" drop</p><p></p><p>600 yards, -30* slope actual = 12.5 MOA = -78.5" drop</p></blockquote><p></p>
[QUOTE="User4302021, post: 1986935, member: 105322"] I don't know what data was used to generate those charts, but here it is from JBM: 308 w/175 SMK @ 2630 fps @ 2000 ft elevation: 600 yard flat drop in inches = 15.1 MOA = -95" drop 600 yards, -30* slope RR = 519 yards = -64.5" drop 600 yards, -30* slope IRR = 13 MOA = -81.6" drop 600 yards, -30* slope actual = 12.5 MOA = -78.5" drop [/QUOTE]
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How close is the cosign rule in slope shooting?
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