I haven't tried it to confirm this, but I believe a charge of 11 gr. of Universal would overrun the case. I load 4.3 gr. of regular Clays in a 550, and it looks like a double would almost overflow the case. In any event, it would be next to impossible to overlook when placing a bullet in the case. Still, anything is possible. One reason, and the only reason I can think of that I'd like to have a 650. Not due to auto index, but rather the fifth station where you can use a powder check.
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