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I wonder why... Magazine Gun Tests
Looking at some issues of Guns and Ammo I saw that the author had a table with the loading of the bullet, velocity, standard deviation of the velocity, and average group size. In the article he pointed out that the load with the largest average group size also produced the smallest group. It got me wondering: why don't the authors report some metric of the actual variation in group size. Be it standard deviation, standard error, variance, or just the range in group sizes. Seems to me that might be a bit more useful in determining the accuracy and performance of a firearm over the standard deviation of a certain load. In my mind, a load's standard deviation is more dependent on the ammo manufacturer than the rifle manufacturer...
Overkill is underrated.