I actually stumbled into Lake Trout and leaded line.
Just attempting to get deep, found out that the Mackinaw in the lake I was fishing were soft biters, would just swim along with lure in mouth, then let go.
very slight increase in drag was all you would notice, I would kick the electric into high, get a good sweep with the rod to set the hook.
Fish on !
The guys using downriggers were not hooking any, I think it was because the bite was so subtle.
All I know is the guy in the 12 foot rental boat (Me) and electric motor caught fish, when the big boats with downriggers talked about how slow the fishing was..
I now have a rod set up just for Macks, but have not had time and money to go back, yet...