William,
I would also buy a digital food scale (about $10) and check the amount of shot you are dropping, just as you weigh your powder charge. You will probably find it is not dropping 7/8 ounce, probably less is what I have found. And the fixed charge bars drop different amounts of shot depending upon the size shot you are using.
That is why to me the adjustable charge bar is worth every penny you pay for it. They also sell one that comes with a powder baffle, which makes the powder charges more consistent. Just my 2 cents.
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