You need to find the right bullet and the right speed your bullet likes in your barrel... This is a labor of love, I start with Nosler Accubond... 180 Gn... Then build 5 with Powder #1, Lets say RL 17, 1, at 66.5, 2, at 67.5, 3 at 68, 4 69, 5 70. So your building 5 rounds at each level of...