I generally run a bit softer than ww in my 45s, both acp and Colt. Range lead collected at a local range has tested an average of 0.4 Sn, 1.4 Sb and works well with some added tin. I usually cast at around 720 degrees according to the PID on my lyman pot. Be aware that many thermometers aren't all that accurate. Frosting for me is usually from the mold being too hot, slow your casting rate or rub the aluminum mold on a damp cloth to cool it some. That said, some say frosting helps PC adhere to the bullets.
You can get good PC from Smoke4320 on one of the cast bullet sites, or Eastwood powder on amazon. Powder by the Pound sells small lots to the public as well. Be warned that many powders won't "shake and bake" but need a electrostatic spray gun. I've been using lots of Eastwood high gloss clear, it works great.
