Going elk hunting in Colorado. Loaded 50 cartridges for a 300 win mag. Barnes 180 grain ttsx's, 70 grains h4831sc, 3.34" oal. Sighted in 3" high at 100 yards. 2,935 fps muzzle velocity as measured on my chronograph. Shot today at longer distances. Still 3" high at 200 yards, didn't shoot at 300 yards( no available spot for that), then shot 4 moa high at 400 (16") and was just about right on for the drop. Ballistic calculator shows different trajectory than what I saw, specifically more drop…by a fair margin. Does this seem odd? I mean, you can't defy physics right?