I find this not to work for me. A good load, it should not matter much. Not enough for you to even tell a difference unless you have other factors you are looking for like groups at 300 yards, or chronograph load data. A good load, you should be able to load up a box of 47.8, and box of 48.8 and average groups should be very close. If its that sensitive, might want to try a new powder. I myself would try a new bullet, but thats me. Like a 165gr gameking and 56gr or 57gr or so of IMR4350. But thats me.