There are 2 main 6.5-284 cartridges, the Winchester and the Norma. The difference between the 2 is seating Depth The Norma requires a 30-06 length action, while the Winchester uses 308 length action. If you could let us know which you have, we could toss velocities around and give you a better idea if your velocities are a good ball park representation of that cartridge. It was a wilder than average wild cat, for quite a few years and is also very well known as a velocity trouble maker because of all the differences between chamberings.