I use boss 5oz sinkers, just on the rear occasion they have seemed to slip and not hold anchor, but i gotta say 98% of the time they are bloody good. i have never been to fussed on casting a line unless theres a bait on it! but i do plan to come along to a couple casting days this year, as i hope to fish the nationals, and i believe casting is part of it, so a few tips might be a good thanx! you will know who i am, apparently im the guy that cast cack handed and upside down! the fish dont seem to mind it thu!