Are BDC reticles just a marketing gimmick? They advertise these scopes that use these reticles as being calibrated for a specific round, like 5.56 or .308. Problem is, the trajectory of a 55 grain bullet going 3,100 fps is way different than that of a 77 grain going 2,700 fps. The reticle can't be calibrated for both. Chances are it's neither. If the bullet drop hash marks aren't going to correspond to nice easy 300,400,500 yard drops, then wouldn't a straight up MOA or Mil reticle be more useful?