In my experience taking game animals is a lot more about confidence in your equipment than folks talk about. For me that starts at the range, A rifle that consistently shoots where I aim it is the foundation. This is sorted out by shooting lots of groups. 1 MOA is my preference for bolt actions and 1.5 for levers. After consistent groups are established I shoot from field positions, this is where your money is made. Time spent shooting from real world conditions is what builds the confidence that when it's time to pull the trigger in the field you will hit your mark.