Both concepts seem to work,things i do not like about BDC scopes #1 the darn dots and circles used for various distances and having to make sure your scope is on max power. with the turret design,one would be looking through clean uncluttered cross hairs at all times.i really don't see any issues with movement, since stand hunter would more than likely have there scope set for shorter distances.when animals are say 100 yds or more,reaching to make a slight adjustment isn't a issue IMHO. for folks that live in area's where long shots are the norm (like myself) the turret system just may be there best option.Nikon is now offering this feature and since i own a Nikon scope, i am seriously considering this option on my .45 cal rifle.in the end it's all about personal preference