I've been pouring for over 10 years now and have never really had any issues pouring many different jig styles. I am having problems with the hammered jig mold from Do-it. The major problem is that I can't consistently get full pours around the wireform. I know the mold says ladle pour only (don't own one). Why would this make a difference? FYI, I'm not using Flux, and never have.