I got a Ruger Mini -14 for Christmas. I have just recently been able to go out and do some accuracy testing. I have a Leupold 3-9 scope on it. Shooting off the bench at 100 yards what sort of accuracy should I expect? I have tried 4 different powders in varing amounts. All have been shot with 55 gr. bullets (Hornady Vmax and FMJ-BT) So far the best I have been able to shoot is 3.5". Is this the best I am going to be able to get or am I doing something wrong?