With good bullets like the TSX capable of handling high impact velocities, I can't think of a better open country round than the 257 Wby or it's ilk like the 264 WM. I got one a couple months ago and haven't had the chance to fine tune a load but I'm running the 110 gr Accubond at 3500 fps with IMR 7828 out of a 26" Ultra Lightweight. My brass started out as virgin Winchester 7mm Rem Mag, worked great.
