Help! I'm having trouble getting that JBM simplified trajectory calculator to work for me. I'm attempting to duplicate my real world results with my 223. At 290 yards I dial 2.5 MOA from my 100 yard zero and am right on. The calculator says it should be 4 MOA! I just shot this again today for verification. Here's what i'm shooting. Bushy Predator 20", 2945fps, 60gr. V-Max over 25 gr. of Varget. I'm shooting from a bench with my targets at my same elevation. My scope sits at 1.75" above the bor. 75 to 85° F at 550 ft. with about 65% humidity. I'm useing a Leupold 4-12 Mark AR with 1/2 moa clicks. I'm using the bullet library and imputing what I have listed here. What am I doing wrong? Thank for your hep.