100% Case fill is not possible with most modern higher energy powders and the huge 45 colt case. Unique is a great powder to use 8.0-8.5 grains works well under a 200 gr lead bullet.
Also, if you are looking for a higher case fill, take a good look at Trail Boss powder. Its one of my favorites for the 45 Colt.
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You are the bows from which your children as living arrows are sent forth.
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