In the 70s when I shot at Friendship everyone use to just put their finger over the spout on a flask to measure powder and pour in down the barrel. Then, and I don't remember the year, we had to pour it in a separate container [ say a 45 case ] and then pour it down the barrel or in a cylinder on the revolvers. It was thought to be safer, and I suppose it is. But damn, for years we just poured it in from the flask. Precise ? I could keep em in a 5" [ whatever the 10 ring is ] circle at 25 yards offhand. Oh, I'd get those pesky 9s once in awhile, but that was me, not the powder charge being precise enough.