Yes all are very good calibers. If I were you I would go with the 300 win mag or 7mm rem mag. Both will put anything down and both can reach out far. The 300 is faster, but the 7mm mag can be just as effective. I shoot a 7mm and my buddy shoots a 300 so I am in between and really like both calibers. We practice at long range 300 and over. If I were to take my 7 mag out west I would load up some 160 grn nosler accubond bullets. Both are versitiale and reloading is better on pocket and you try differnt loads to see what is best in your gun and for you. Which ever choice you make good luck and be safe.