Bringing this thread back to life for a minute. The Line I use is 25lb mono but the line isn’t perfectly round like how lighter line is like tooth floss kind of. Mine is more of a rectangle shape and think it’s because the material or something just gets squashed easily. Idk I know nothing about different types of line, I always just use what I got and never had a problem until I got a bait caster. When I first got it I had a thinner 20lb line on it and I was doing perfect with casting it after a couple minutes of warming up to it but then I got a bad bird nest and ended up cutting all line out and somehow that spool was empty and only had 25lb line and now every cast I make the line just gets thrown off the reel. Any help or advice please