Well only because you have those two presses. The weak link of any progressive is the priming system. I have no issue priming on my 550 or 650. Hand priming with a progressive negates the point of the progressive, to do less work. There probably is no better priming progressive than a 650 & 1050. Just sayin.
That's how I feel about it. I use the Dillon 650, have everything set properly, and the machine does an excellent job of setting the primer at the proper depth.