BC - just in the last couple of years the folks at Sierra have recommended that, if you are not getting good groups with the bullet seated fairly close to the lands, to try seating them deeper. It's kind of a "last resort" solution, but sometimes it works. In my 6MM-284 that I just re-barreled with a Jeff Lawrence 1:9, the 105 Hornady A-Max is shooting right at 1/4" with the bullet seated about .075 back from the lands. I would have seated it closer, but the magazine length of the short action Remington limited me to 2.810 - so I tried it at that length, and I'm not wanting to change anything now