If you have 4064 and Varget you are good to go. There are lots of good 308 powders, but I'd bet you get good results with both of those. I read more recommendations for 4064 as being the most accurate 308 powder. I've used it with good results and gotten good speed. I have a slight preference for Varget simply because it is more resistant to temperature change. If it is any less accurate I can't tell in my hunting rifles.
I've used a wide variety of 165/168 gr bullets. They are a good compromise for most uses. Your 1:10 barrel should be good with some of the heaver high BC bullets if you ever want to try them. I haven't yet, but have seen some amazing things done at ranges approaching 2000 yards with a 308 and 215 gr bullets.