US869 is the fastest powder listed by Nosler on its website for the 26 Nosler. And, Nosler lists 869 as the most accurate powder for 123/125 and 129/130 gn bullets. I'll be shooting 120 gn bullets, but I would expect 869 to still be plenty accurate with a 5 gn lighter bullet. Speed and accuracy, what's not to like? A few people have mentioned that 869 burns dirty. I am not sure what that means, though.
I've got IMR7828 on hand, and that is the second fastest powder listed by Nosler for 120 gn bullets, so I was thinking of just trying that, first. If I don't get the accuracy I want, I'll give 869 a try.
