I tend to go to 1/4 as the lowest with 3/8 as the highest when texas rigging on a MH baitcast rod. I tend to feel that the higher weight suggestion is the more important one as if you have too much weight there is a chance it could snap the rod on a cast. It you can cast a lighter weight on it, go for it. Like Scarborourgh said, the plastic and hook have a weight as well, and sometimes that plastic can be quite heavy.