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For my AR-15 I have been using VARGET powder, while I can’t find any fault with it I want to try something new. I went with CEF223. The first thing I saw was it measured nicely and consistently. 9 shot from the CHRONOGRAPH 68gr HPBT 24.5 CEF223 Shot 1 2450 Shot 6 2450 Shot 2 2450 Shot 7 2478 Shot 3 2450 Shot 8 2424 Shot 4 2428 Shot 9 2450 Shot 5 2428 Hi Shot 2478 LO Shot 2424 AVG Shot 2445 Standard Deviation 16 Extreme Spread 54 I do believe that the ES came for the bullets being +/- .1gr. With match grade, this should tighten right up! Over all, I am very happy with CEF223