[cracked butt]

Hatcher recounts in his Handbook the results of a National Matches in the 1930s.

Apparently one shooter broke open a bunch of issued ammo and found that there was a pretty significant variation in charge weight with the MR or IMR powder (extruded stick) then in use. The rounds were loaded on new machinery using volumetric loading.

The guy really raised a stink about this, assuming that because of the variation in powder weights accuracy would go down, but IIRC there were more high power match records broken that year than any other year before, and most shooters reported greater accuracy overall.

With IMR powders, at least volumetric measuring has been shown to give rounds that the same overall accuracy potential as rounds in which each charge has been hand weighed.

Excellent!