Re: 300 RUM or 7mm with 180 bergers at 3000 fps
Dang this thread just keeps going. I pulled my Sendero 7 Rum out for a back up this year.. took two shots at the 200y Bull, 1/2 inch to right and 3/4 inch apart at 2960fps. Nice to know it was still on and consistent should I need it.
85.5G Retumbo, 215m primers 2x fired Nosler brass.
About the velocity question, It might be a brass issue, the bullet grip and case change a little bit every time it is fired from the brass getting harder.