I hope more data comes out with these CFE powders. I have shot kegs of IMR 4895, AA2495, primarily in the 308 Win, but also in the 223. If these CFE powders are the new, best, thing, I will use them.
I have seen decades of "powder's du jour", I remember when Alcan powders were just the thing. Norma came, went, and came back!. AA2520 was considered the end of history, and of course, smart guys told us that Vihtavuori powders were one of those epoch starting things. We are now living in the age of Vihtavuori according to the accolades of the 1990's. For all of these, there are still true believers, but I have grown skeptical having seen so "powder du jour's" get relegated to oblivion. I am hopeful that one day, technology will give us something great.