There are many opinions on the depth that copper goes at various speeds. The charts in the latest Big Water Precision Trolling are way off in my opinion.

I think a good general rule of thumb is that 45# copper goes about 22 feet down per 100 feet out at 2.5 - 3.0 mph. It seems like 200 and 300 foot lengths are what most guys are running.

Capt. Jim McDonald