Lyman also made a conical a while back called the Shocker. It was 420 grains. I tried them in a number of rifles and all I can say is the last seven of them were melted down by me to become roundball. I never shot a conical that was that bad for accuracy.
I had been to a muzzle loader store sight and they were on sale. That should have been the first alarm bell. So I bought three boxes of them. Having lots of rifles, I tried them with lots of powder, lots of rifles, and came to the conclusion that they needed to be melted. I never ran across a conicals that I could not get to shoot, but that was one of them.
Some of the favorite conicals I shoot are of course Bull Shop slip fit, maxiball, REAL, and Hornady Great Plains. Buffalo Bullet company years back made a big conicals bullet that was good out of my Renegades, but I forget their name.