You definetly dont needa 300 win mag or a 7 mag those are like elephant guns, you dont have to get a big gun anything from a 22-250 up to a 30-06 is just fine, but unless you plan on elk or moose hunting you dont need a 300win mag or 7mag from 50 yards a 300 min mag will send a running deer backwards, deer are thin skinned, it doesn't take much.