I have tried 8208 in my 223 and my 223 ackley
I was never able to get it to out do Benchmark.
I saw that it needed to be near max in order to group well and get the sd's down on the speed.
I been thinking of trying it again with cci magnum primers to see if a little more heat with help it settle down.
although I don't know for sure how much hotter they are than Rem 7 1/2's or winchester small rifles
