Surface tension is the problem even with flouro it can be a pain, degrease yer leader as said also add a heavy buzzer as said again , or give yer line a tweak after casting, as far as flouro being great for buzzer fishing , well i use it for dry flies to

the lower the BS the easier it will float, i dont use anything higher than 7lb for buzzer work and 5lb for dries, cant see the point of heavier lines, like bloody rope, which can be a disadvantage as ive found out lately , now ive changed to mono for my main line when buzzer fishing under an indicator.To many people think fluoro is the be all and end all for fluff chucking but it aint, mono has advantages of being thin so equals out the so called invisibility of fluoro, which i dont believe and its alot bloody cheaper

of course theres the environmental aspect to , dont like the idea of a line that will out last me

Gaz