though I tend to follow the rule of them that though a large racked buck may rub a small tree a small racked buck will rarely rub a large tree.
I pretty much agree with PA. I've seen larged rack bucks work over small and large trees....and even seem some med rack bucks work over larger (3"+) trees. But I doubt many small bucks are making the real big rubs (4"- 8"+). Usually that is a good one.