I have done ok with rub lines. But you have to know the woods well and look at the big picture. Rublines coming in and out of bedding areas hunted real close to the bedding area can be very hot. Sombody mentioned big rubs being made by little bucks, I have seen this also...BUT, big bucks rub heights will be consitintly higher than little bucks. In the midwest where I do most of my hunting, I look for rubs where the middle of the rubbed portion is bellie high. I also look close to see where tines are hitting above the rub, indicating tine lenths.