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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cosine or degrees which do you prefer?
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<blockquote data-quote="7mmRHB" data-source="post: 331019" data-attributes="member: 3584"><p>Using the degree of angle is far more accurate than COS !! Here is an example from my Ebal charts for my 7mmRHB fireforming loads.</p><p></p><p>168 berger @ 3255 fps-- starting 3" high at 100yds, takes 16 min. IPHY elevation change at 1000yds. Shooting at a 30* angle the COS tells you 87% or 870 yds shot equivalent ( 12 min.IPHY)</p><p></p><p>Now going to Exbal and hitting the angle shooting function on ECCEL and looking at the chart for a 1000yd shot at 30* and it gives you 14.25 min. IPHY or the equivalent of 925 yds to make the shot !! This is because you still need to take into account the time of flight and the effects of air drag on the bullet for the entire distance ( 1000yds )----RHB</p></blockquote><p></p>
[QUOTE="7mmRHB, post: 331019, member: 3584"] Using the degree of angle is far more accurate than COS !! Here is an example from my Ebal charts for my 7mmRHB fireforming loads. 168 berger @ 3255 fps-- starting 3" high at 100yds, takes 16 min. IPHY elevation change at 1000yds. Shooting at a 30* angle the COS tells you 87% or 870 yds shot equivalent ( 12 min.IPHY) Now going to Exbal and hitting the angle shooting function on ECCEL and looking at the chart for a 1000yd shot at 30* and it gives you 14.25 min. IPHY or the equivalent of 925 yds to make the shot !! This is because you still need to take into account the time of flight and the effects of air drag on the bullet for the entire distance ( 1000yds )----RHB [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cosine or degrees which do you prefer?
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