I have used this powder in my 264 mag and 270 wsm. I worked up a load in the 264 using the 120 gr ttsx bullet, it is the most accurate bullet/powder combination that I have found so far. The 270 wsm is a different story, I worked up two loads using the 150 gr nosler partition and the 150 gr Barnes X bullet, with this load combination I was getting good groups and good velocity (2980 fps) but when the temperature dropped to below 60 degrees I would lose about 80 fps velocity. If you want to try this powder I would suggest that you use the hottest primer available, either winchester magnum or federal magnum primers. This is a slow ball powder, good luck.
