Has the OP done any searches on this topic? This has been hashed out here time and time again.
No need for a big boomer unless a guy just wants one. Short action rounds with the right bullets do just fine. Look at ballistics charts. The same bullet started at 2800 FPS vs 3200 FPS generally has a much smaller velocity gap at longer ranges (say 500 + yards), making the bigger rounds have much less of an advantage than initially assumed.
I carried a .340 Wby and .300 Win for several years and they did just fine at "normal" ranges, but that was before I started learning about B/C and shooting further out.
Carry on.
