Like mentioned above the two things that have improved my shooting themost is breathing and trigger control. I got 2 3/4 lb timneys on all of my rifles and that has helped me immensly. Now for breathing, I shot with a friend of mine who was in training with the local county swat team. He showed me how they were taught to breathe by inhaling and then exhaling to half lung capacity. By doing this your lungs dont feel like they need to get or dispell oxygen so that is when you are the calmest.