Very few go to the 180 in .357 mag, the Hogdon sight does for the 180 Nosler partition, and I personally would use that as a starting point, as typically lead bullets in a given weight offer less resistance than their jacketed cousins, the thing with Heavy bullets, is you can get into trouble with seating depths, depending on the seating groove on the lead bullet versus the cannelure on the jacketed bullet, you get too much bullet in the case and cause over pressure, the Lyman Cast bullet manual is the best but I don't think it has been updated in a while. Both with new powders or bullet designs.