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Long Range Hunting & Shooting
Numbers don't add up
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<blockquote data-quote="lancetkenyon" data-source="post: 1949401" data-attributes="member: 68875"><p>If it is a BDC reticle, subtensions are actually something like 0, 1.5MOA, 4.5MOA. 7.5MOA, 11MOA IIRC. (for Vortex)</p><p></p><p>Not many rifles are going to produce exactly those drops to hit 300, 400, 500, 600 yards perfectly with a 200 yard zero.</p><p></p><p>For a quick reference, the 180 Federal @ 3000fps, 6000' elevation @ 40* F will drop something like:</p><p>1.9 MOA @ 300 (6.0") (1.5MOA subtension is 4.7" @ 300) Close enough</p><p>4.2 MOA @ 400 (17.5") (4.5MOA subtension is 18.8" @ 400) CLOSE</p><p>6.7 MOA @ 500 (35.2") (7.5MOA subtension is 39.25" @ 500) 4" high, probably close enough on a bull elk, but close to the top of the lungs</p><p>9.5MOA @ 600 (60") (11MOA subtension is 69.1" @ 600) 9" high @ 600 is probably either a miss or a wounded bull</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1949401, member: 68875"] If it is a BDC reticle, subtensions are actually something like 0, 1.5MOA, 4.5MOA. 7.5MOA, 11MOA IIRC. (for Vortex) Not many rifles are going to produce exactly those drops to hit 300, 400, 500, 600 yards perfectly with a 200 yard zero. For a quick reference, the 180 Federal @ 3000fps, 6000' elevation @ 40* F will drop something like: 1.9 MOA @ 300 (6.0") (1.5MOA subtension is 4.7" @ 300) Close enough 4.2 MOA @ 400 (17.5") (4.5MOA subtension is 18.8" @ 400) CLOSE 6.7 MOA @ 500 (35.2") (7.5MOA subtension is 39.25" @ 500) 4" high, probably close enough on a bull elk, but close to the top of the lungs 9.5MOA @ 600 (60") (11MOA subtension is 69.1" @ 600) 9" high @ 600 is probably either a miss or a wounded bull [/QUOTE]
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