Okay, so let me see if I have this right. Lead core lines that you cut to certain lengths depending on how fast you want the line to sink. The more head the faster the sink, right? Have to use less of larger sinking heads also, right?

Cortland is 13 grains per foot, more you use the deeper you should be able to get?

Rio Shooting heads just have faster sink rate options so you can use less of one or more of another and achieve the same results?

I am curious, I have lead core trolling line, can one use that to experiment before spending so much on specialty lines?