In .308? H4895 (if you have or can find it), Varget, or StaBall Match would be my first three tries. I'm sure IMR 4895 and 4064 are worth looking at, too.
I doubt we'll do a factory .308 load because it'd end up being over SAAMI max COAL. I'm pushing for it to replace the 168 Amax in our M1...