What is the best caliber to hunt wild pig,dear,turkey,and wolf?
 

I am going hunting this year and am trying to learn what i can

There aren't a lot of places that allow a centerfire rifle for turkey hunting. If it's legal where you live, go small. Anything in the 30cal family of bullets will likely ruin a lot of the meat.

As for the other animals you listed; wild pig, deer, wolf....look around the Big Game and Exotics forums.