I used mine last night. I am very glad I read up on the operation prior to actually using the unit. From the start, I was lubing my .502 bullet perfectly. I did not realize I was bigger than 502 cast. Never bothered to mic after initially measuring at 501. Must have been a different mix in the pot. The Star preformed perfectly. I needed to learn my lube use rate(which is high for the 500 bullet), to maintain a good fill but the curve went quick. I caught myself short stroking and not pausing at the bottom of the stroke a few times. Once I got the cadence down, it was time to rock and roll. Need to cast some more 350 501's today. Waiting to get my 44 250 die from mountain mold. A 405 gn .460 mold is a future buy. The Star Sizer is definitely a top shelf item.