Issue with my MEC 600 was bending rims on Cheddite hulls. Could have solved it by not using cheddites or perhaps replacing the ring on the MEC. I do think you need to size if function is critical. Have 2 PWs easy to set one up for the 10 From scratch new press I think a MEC Size master probably the way to go . Separate size prime charge seat routine is the way I load Metalic & way I am programmed
William
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