Even with the progressive press you need to grind or file the slot [ where the screw slides back and forth in ] longer so all of the powder hole in the bar will go under the powder bottle hole. I've found in my Mec 650 when useing a small amount of powder the bar wouldn't slide over far enough. Take off your bottles and look down through the powder and shot bottle holes to see if the bar is moveing far enough. With a 650 you'll then need to adjust the nut that moves the bar . I've done this on two of my Grabbers and on my Jr. which all have the adjustable bar. Paul
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