Well I got some shells loaded and shot them in my 270 WSM.. There was good news and bad news the good news is it will likely shoot fair groups. The bad news is it will be at lower velocities then I was hoping to achieve. It also liked the the closest to the starting load. I never had pressure signs I was using the Barnes 129 LRX bullet. I have a feeling this powder will like cartridges that are more over bore then my short mag. It turned out in the end I will likely be using RL22 at a max load as it shot under a three quarter inch group.