i havent used the lead core, but i,m planning on trying the 300 copper this year for walleye on the central basin of lake erie. so im trying something new this year. but i do most of my fishing from 55 to 65 ft with my lite bite slide divers, and the 300 30# is sopposed to run 50 to 55 ft, so i can start at the 300 ft and just let out alittle more line as needed to get on the fish. hope me luck.
sherman