I spent a couple of hours casting with my Lyman 311041 today. Two hours wasted! Every single one came out under-size. Man do I hate this mould!! I'm running 94-3-3 alloy. This mold will only work with a melt temp of 640-660. Any hotter and lead will run into the vents. If I pace myself correctly and keep the mould in the "sweet spot" (heat-wise) it will drop good boolits at .310-.311". Perfect size for my Marlin 30-30's Microgroove barrel. Too much heat, they come in under-size, too little and it's wrinkle city. It's a very, very narrow operating range. Anyone have any ideas??