I just started pouring bucktails for fluke fishing. I've been doing smaller ones without an issue. When I try pouring 5oz -8oz I'm having a hard time getting the lead to melt all the way around the collar. I've tried using a 10lb bottom pour and 2lb hot pot. I've had better results with the 2lb but still having issues. I've tried heating the mold, holding mold at an angle, adjusting my heat temp and varied my pouring speeds. Still not molding right. Anyone have any suggestions? Thanks