Nowadays, this multi-strand copper wire is all the rage with Great Lakes salmon anglers because it achieves twice as much depth per length as leadcore line. And walleye anglers are catching on, too. In the summer or during seasonal transitions when walleyes are staged in deep water, copper-wire trolling systems are proving to be the most effective way to take small presentations deep and maintain depth control through the target zone. Better yet, its thin diameter excels at speeds in excess of 2.5 mph, while still maintaining depth. Lures such as lightweight trolling spoons, shallow stickbaits, and even crawler harnesses can be trolled extremely deep with relative ease.