i recently bought a RCBS 45-325 FNU mould thats suppose to drop around 325 grains. I bought the mould for a reduced load for my pedersoli trap door. Its dropping at 343-344 grains which is heavier than i anticipated. I was using a 405 grain bullet mould. Im using range lead and normally that alloy drop very close to advertised weight in every other mould i have. It was raining all day yday if that would matter that much.Casting temp was 750 degrees It drops at .459 Any thoughts?