I load 270, i did try 4064, i have a rem 700 in 270, 1964 vintage, however, 4831, and 4350 worked better, groups at 150 yrd with 4064 were about 3.5" 4 shots, then tried 4350 loads, very nice grouping, 2" , THE 4831 was in that ballpark as well, i use 150 gr nosler ballistic tips and sieera 130 boattail, both excellent performers im looking for some 110 gr vmax for coyote loads, or speer 90 gr boattail hollow point, as far as 4064 i didnt try alot of it, it works ok, but there are better powders in my opinion, check out some older manual's i use a hodgdon #24 manual, comparing it to my newest book from hornady, todays data is weaker, alot of powders arent used anymore, but available at gunshows and old stock in gunshops, check it out