I will admit that I am Jr. High level talking to college level, but I chose to go a different route. I do not like to ball park anything. If I am shooting at an animal at lengthy yardages, I don't shoot unless everything is right. So, I have a program that is for my bullet, my scope height and my velocity. I have used many scopes but have a NXS with fine cross hair with dot. I use a leica rangefinder and click my scope to the exact yardage and hold on, with a perfect clear sight picture. There are many good programs to choose, the one that I use is very accurate. I talked to a sniper and we were talking about this and he said they use the marks because they have to shoot quickly and don't need to be exact, a body hit from waist to neck is good enough. He said that in cases where there is time they also click to exact points. I have also used a scope with 1/8 minute clicks and prefer having "finer" adjustments. At 1000 yards 1 click makes a difference when using scope with 1/4 minute clicks. Guess I am just old school.I only have a 100 yard spot to shoot. I have an Idaho elk hunt in october where the ranges are 400 + yards. I put a target at the bottom of a tall cardboard target. Using my Vortex Razor's internal bullet drop comp. I checked zero on my 300 Win Mag using 180 gr. Federal Trophy Bonded tip factory. My zero was 2' high at 100. Now using the scopes 300, 400, and 500 yard marks I aimed at my zero spot and shot at the yardage mentioned above. My 300 yard mark was right on at 6.5 inches of holdover. The 400 yard was 14.7 inches high vs Federals 19.2 inch,
THe 500 yard was for me 22.5 inches vs Federal's 38.6 inches. The Federal info came from the ballistic calculator. My rifle can't be shooting that flat so can someone explain where I went wrong