I've had them up to mid 40's, I target specific waters for the fish that live in them. Many are real old looking dark, sclay fish that are masters of their environment, they've lived there for 30+years. It can be a real challenege and a buzz targeting specific fish in 100+acres of water. I also fish for the Barbel on the rivers and target the Perch in the winter. When I visit the States it's always Bass fishing but for me a 4lb Bass looks like another 4lb Bass, good fun though seeing them smash the surface plugs but I'd rather take a 30lb carp of the top and see that huge eruption when it realises its made a mistake