You need to start practicing now! How much shooting experience do you have with a rifle? If new, start with a .22 Long Rifle to get the proper form. After your form is sound, move up to your center fire cartridge.

Something else you will need to know for a clean kill are the proper zones on the game animal for shooting and the proper angles. The angle, distance and shot presented will determine the proper POA.

Know your shooting limitations before you go hunting, and stay within those limitations.