Any scope you get, whether AR, BDC, or MIL/MOA still needs to be shot in (if that’s the right term). No matter how complicated or simple the reticle, you need to shoot it on your gun, with your barrel, with your ammunition, to find out what exact range those hash marks will correspond to. And it will make a difference at what range you sight it at. Sighting your gun in so the crosshairs are dead on at 100 might mean that the hash marks on the BDC are 200, 300, 400, 500, or it could mean they are 239, 365, 473, and 557. Or if, like me you sight at 200 yards (about 1 1/4” high at 100 with 55gr) those hash marks could be 337, 409, 517, and 589. All of those things will make a difference when you are talking about a varmint gun. At 400 on a coyote, 40 yards can make a big difference, and it can make the difference between a hit, and kicking up dust in front of him.
My advice: get the reticle you want/like and that you are comfortable with. Then shoot it at the different ranges, with your chosen ammo so you KNOW what those different hash marks represent.