I have never even thought about the actual weight of the jig, it is more the physical size of the jig head that I look at. And the only reason I even use a collared jig head is for something for the thread to hold on to, instead of trying to tie to a hook shank itself. The collar helps makes the hair or what ever flare out. While open water fishing, a slower drop is usually better, so who cares what quality lead it is, as far as weight. When ice fishing I often use Tungsten jigs because they do drop faster but you are going through ice and slush sometimes trying to get it down the hole, and you want a small heavy jig to get down to your depth faster and help keep your line tight to detect light strikes and keep line coil to a minimum.