After years of trying to toss larger flies on smaller sized rods, I have come to the conclusion that it is more effective and more enjoyable to use a fly rod and fly line that match the size of flies that I want to be casting. Casting a big, heavy, bulky fly on a five weight trout rod is not much fun to me.

My opinion is that the fly line that you use for tossing streamers can make a difference. A couple of years ago, I replaced a standard trout taper six weight line with a 6 weight RIO Smallmouth line on the six weight rod that I use for small stream smallmouth bass fishing. The Smallmouth fly line made it much easier and more effective to toss heavier and bulkier flies. The Smallmouth line did not have the subtle presentation of my old fly line, but I don't care about presentation when I am fishing streamers or poppers.