I am just getting into reloading and have been shooting Federal 308, 168gr HPBT Matchking with great grouping. I am hoping to make a similar product but I don't know what kind of powder to get. I have been reading a book called The ABC's of Reloading and I found IMR 4064 and IMR 8208 XBR as potential powders but I would like to hear some peoples first hand use and recommendations.