Yes. I have used Xterminator, Tac, and Big game.
Ramshot powders are great powders producing very linear and predictable results. The company who owns Ramshot also just purchased the Accurate Arms powders.
Tac is a great powder for the 308. It has a low flame temp to keep your throat lasting awhile. It also gave me some great velocities in a Ruger .204 with 40 grain Vmax. I was getting 3850 with it.
