My 340 Wby Mag. would be my choice. I push a 250 gr. Barnes X 3060 f/s with 5197 ft/lb. If I do my part with this load, it will shoot .408" @ 100m. If you want a more powerful .338 step up to a .338 A-Square, .338-378 Wby. Mag., .338 Titan, or 338 Excaliber in that order. Good luck.