I use 180 grain Accubonds and 73.5 grains of RL-22 for my 300win mag. Out of my 25" barrel, I get overlapping holes...about 0.25". Keep in mind the diameter of the bullet makes up a lot of that 0.25"! I could maybe tweak it a bit and get holes inside of holes, but when the net result of a 5 shot group is just one hole (not perfectly round, though), I'm satisfied. I may come back and tweak it after my LR class this fall though.