Real Snipers[tm] always check the tables for long and difficult shots, or if extreme accuracy is required. It's easy to get a number wrong in your head, and additionally, there's compensation tables for wind drift and elevation to take into account. Most write their own bullet drop tables from test firing. I'm not quite sure how this watch works, as they mention it provides "hold over"...it should rather display the amount of clicks to adjust on the scope dials. Think I'll stick with my trusty note pad.