Q: What is the correctprocedure for measuring 3 and 5-shot groups fired in accuracytests of rifles and ammunition in gun tests? I’ve noticed that yourown targets have four one-inch blaze-orange squares for aimingmarks. I presume it is easier to calculate how many clicks areneeded to align the reticle in the scope and that the orange colourmakes them easier to see?
A: Groups are measuredcentre-to-centre of the widest bullet holes. This is usually donewith a caliper. The method I’ve found most efficient is to measurethe total group outside and then deduct the diameter of one bullet.It’s a lot more precise method than trying to centre the hole in atight group.