I purchased some fly line, and by accident I picked up one line weight too large for my setup. Right now I have 4wt spooled, but I'm thinking about spooling the 5wt I just bought. So here are my questions; 1 - What is the difference when roll casting a heavier line? Easier, Harder, or not noticeable? 2 - I have heard that this will also help "load" the line better and make it easier to shoot for longer cast. Is this true? Wondering if I should take it back and pick up a 4wt as the spec calls out for, or should I just spool it up and see how it does? I really would like to not be waist deep in the water when/if I were to have some serious line issues. Could very well ruin a good days fishing, and a decent drive as well.