Hey guys, I need some advice on what I'm doing wrong here. I'm getting consistently poor nose fillout on my Lee 200gr 30 caliber mold. This is one of the older single cavity molds. Alloy is WW with ~2% tin. I've opened up the vent lines on the mold already. I don't have a thermometer yet (it's on the way) but casting temp is the same that I use for my Lee and Lyman .45 cal molds with good results.
My problem is that I consistently get wrinkles in the nose, even when the driving bands are filled out. I'm using a Lee 20 lb bottom pour pot, and even tried pressure pouring into this mold by holding it up against the spout. Casting quickly with this method gets the mold hot enough that the driving bands get frosty and not filled out, but the nose is still wrinkled. I've tried preheating the mold by holding the base in the melt for a bit, until the melt doesn't stick to the bottom of the mold. I've tried adjusting the bottom pour to dump the melt fast or slow, and I've also tried ladle pouring with the same results. I'm stumped.
Here's a picture of a few typical boolits. The one on the left is the most typical. Note that the wrinkle in the nose is on the vent line on this particular boolit, but often it's not along a vent line.