I had lots of trouble with a toaster oven with the larger diameter bullets, 90 gr 25 cal, and 308s worked ok but my 45s didn't cure well. Finally go the convection type and problem solved. Thinking the added mass of the 255 gr 45s in the large 100+ count trays I was running needed better circulation and even heat. I've taken to running the 45s for 35-40 minutes to make sure the core temperature of the bullets get warm enough to keep from holding down the surface temp.