I just did not care for the performance of the cartridge. I chased too many deer around the hill with them. I went back to the 30 calibers.
I shot a few dozen of our large bodied Canadian deer,as well as a mountain goat.an elk and a few pronghorn with the 257wby.I was disappointed in the accuracy of the Mark V rifle,but the cartridge produced quick, clean kills on the game that I used it on.