Originally Posted by BrentM
You lost me on that one.
The reason I provided the link was so you could get unlost, if you felt the need.
If you're calculating elevation dope for sloped shots based solely on the calculated horizontal distance (cosine angle times true sloped distance), then you'll have calculated bad elevation dope. The longer the shot and the greater the slope of the shot, the greater the error.
Perhaps you'll be more inclined to pay attention to the member that started the thread I provide the link to, IF you understand that he makes a portion of his living training long range hunters and shooters. He also used to believe that calculating the horizontal distance was the correct way to determine vertical dope. He wrote this thread to correct himself, and others he had errantly instructed - previously.