The correct use of the funnel thingy is the hull slips into it and the funnel end aids in dropping the powder into the hull, sliding the wads into the powder charged hull, then the shot is poured in, again allowing the funnel to aid in charging the hull. All this while you are holding the funnel upright and doing everything with your other hand. You'll become ambidextrous before you know it.
Now, about your dominant hand . . .
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