Big Tom,
You have chosen wisely. I have been a fan of the 7x57 for decades and finally got one a couple of years ago, a Ruger 77. I used it to take the last deer I shot in the lower 48. I used a Hornady 154 grain over IMR 4350 to take a large bodied 3 point mule deer at 80 yards. One deer does not tell you much but the 7x57 has a great track record. I sold mine, but only so I could order a left handed action to build one with bolt on the correct side. When it is built it will be my sheep/goat rifle and my pronghorn/mule deer rifle. I would not hesitate to use it on any North American game. It wouldn't be my first choice for a large bear gun but I would use it if needed. Good luck and good hunting. Mart.