Well said, Chuck. I would add that in addition to the small weight variance you noted that you might see some small head size variance within a given weight range as well. And then maybe some pellets have small bits of lead off center in the skirts. Combine those things and you could well see fliers. And as you note, it is maddening when it happens. I'd rather shoot than do such work myself. But if such work helps make shooting more consistent and I didn't view it as an arduous task then it would be worthwhile to those focused on such. If anyone would rather just shoot then by all means do so.