The Rio bonefish line has a really long head length (49.5 feet) compared to 35 feet (I think) for the redfish line. The bonefish line is very difficult to cast at close shots you get for redfish. You will get nothing but frustrated. Many of my redfish shots in winter Louisiana are 20-30 feet, with very few farther than 50 feet. Of course this is 100% sight fishing. Rio now has summer and winter redfish lines but I have not looked at the differences. Most modern fly rods can easily be up-lined by at least one weight, even with a line like the redfish or power fly lines.