[Joni]

I do use regular fishing line on Stillwater, but then I am not too worried about taper. Keep in mind that regular line (as in bait or spinning) is a different diameter than fly fishing although they may have the same "X" or lb.
I build my own leaders for picky waters and rivers and streams and it starts at 0.0021 to 0.005 for a 6X (with seven more sizes in between), kinda hard to do this kind of taper with regular fishing line.