Thread: Loading for .300BLK

Originally Posted by Max Headroom

@Wingman, when you measure your groups, I notice your calipers are set over the centres of the two furthest holes of each group, rather than the outside edges.

Is this technically/officially the more accurate way to measure a grouping?

If you take a 308 and shoot a group of one, and measure the outside of the holes (there's only one) you'll get a measurement of approx 0.3". Does this mean you have shot a 0.3moa group? Of course not