I just started using one, works great . Simple to use, and very fast once you get rolling . I bought tempilaq for 750 and 450 degrees . I used the 450 once, I would never buy it again , you will know right off you are too hot if the 750 all turns . One thing I will add ,if you do get one trust the Tempilaq . Color is an indicator but all brass is different . I did about one thousand .308 brass , six different headstamps . None of the six look the same . As an experiment I tried to make them look alike , to do so some were turned to dead soft before reaching the desire color .