I have the 750 and 650, I like the new priming system much better than the rotary on the 650. The indexing of the shellplate seems smoother, less powder spillage loading 9s (750 is for small primers, 650 large primers). If you have a 650, I wouldn’t upgrade, I got tired of changing from small to large primers on the 650, this is the only reason I bought the 750. So far , I am happy with the 750, if you don’t have a 650 and in the market to purchase a similar press then consider the 750, I don’t think you would be disappointed.