I have a 700 that groups different bullet weights level but sideways and have always wondered why. I do load 270 but the rifle is a 30-06 I am refuring to. If sighted center for 150 gr. will shoot 180's a nice group the same height but to the side 4 to 5 inches and when I tried the 55gr. accelerators it was about 9".
I have done this on one target and you have 3 groups exactly level but several inches sideways to each other.Like the rifle mentioned above.
Anyone have a good explanation why?