This is 15 shots with no cooling or breaks, about one shot every five to eight seconds. The only fifteen I fired today. Bipod and rear bag, just laid down on the concrete and sent them. No cold bore. Measurements are edge to edge. If you want to subtract, then you can take about .21 off as it's a .243 projectile but doesn't leave a .243 hole.
To answer the obvious question, the group is not centered because I dialed off. I'd destroy my point of aim if I shot "zeroed".