Working on loads and worked up a small ladder today on three weights. Narrowed these down from earlier loads. From your 223 experience(may apply to any caliber), would you expect the different points of impact I experienced with 55, 60, and 69 grain. Not worrying about individual shots, but location of group as a whole. Particularly surprised at the 69 grain difference from the other two. Look normal?
I think I have an idea where to concentrate and work on seating depth.