I don't know the Perfexion rods, but I have an old 7ft L&F Skiwave which is about a medium heavy too. Rated 3/8 - 3oz. For Bucktails though, I doubt you'd have to go too big. Biggest I've thrown is about 1oz with my Skiwave. Could definitely handle more but if you have the right line on your setup you would not need to throw bigger for more distance.