For instance the Vortex BDC is not hard to use if you zero and calibrate on the highest power. 9-10x is Plenty for a 300yard shot on a deer sized target. On my Vortex 2.5-10 Viper HS the bottom 2 "hash" markes came out fairly even on my .223 with my velocity. Have I ever used them in a hunting situation? No. Totally unnecessary on a hunting scope imo. To me anything over a 300 yard shot while hunting is marginal. Target shooting 1200 yards is no thing with a FFP and my Dope sheet.

God, Family, and Guns. Be strong in your beliefs and work hard.