When I was hunting I used a 7mm Mag.
When I went to sell it (hunting days are over due to back and lack of time) I went and shot it and realized it was the nastiest shooting gun. Far worse than a 375 H&H or 338 Winchester Mag.
It can be tamed with a good recoil pad but........
For varmints something smaller.
270 is a good gun, 06 is more versatile.