Lee molds take some care and tuning for the most part. The exception is their 6 cavity molds. they seem to be made better than the 2 cavity molds. I cast for 9mm,10mm and 358 and the 6 cavities can make a pile of bullet quickly. I have a couple of 309-170F molds which have proved to be the best fit for my 30-30's vs the larger and smaller weights.