I sould have grabed a pound of 4064 while I was across the bay, but I do have RL19 which is supposed to be really good for the 150gr bullets. Nosler lists RL19 to be the most accurate powder they tested with 150s, and amongst the fastest too. I have some 150 Accutips, I don't know if they will top what I have done with 165gr SGKs but if they do I won't be afraid to use them on these smallish South Alabama/Florida deer, I could drive 125s through these tiny 120-160lbs things we have here. I am not griping though, we get high limits and they are easy to drag out of the woods.