wrinkles ???always a heat issue - heat of the lead in the mold - cant always be cured by making the pot hotter - the wrinkles are caused by the pour solidifying as it it poured - so if you're working in cold weather its worse etc - I take those LEE molds and drill out the hole in the sprue plate - you wouldnt believe how much easier life gets -its developed into a habit soon as I get a new LEE mold I yank the sprue plate and drill it out. (i go up three or four drill sizes) HA! did the same with a new brass mold I got from CBE - big fail !!had to fit a new sprue plate.