Using 140's and 4831 my 256 will comfortably manage about 2850 fps. This is about 100 fps faster than my 6.5x55 and about 75 fps slower than the 6.5-06 using the same combination. Now, I am already anticipating all of the posts telling me about their rifles which produce much higher velocities than these but I don't care. I have gotten 2850 from the 6.5x55 but that load was too hot IMO; just like 3000 from a 6.5-06.
The 256 Newton is surprisingly difficult to form well and I appreciate the availability of Jamison brass. GD
