Leaded trolling line question

[acey]

Hi everyone- I got some leaded trolling line for Fathers Day so I can get my lures down deeper when I troll the bigger lakes. My question is regarding spooling it onto the reel. Do I need backing between the reel and the line for 100 yds. of 27 lb.? I have an old bait casting boron rod and reel I haven't used for a year and I plan to try it on that reel. Any ideas or suggetions are appreciated. Thanks, Acey
[signature]