cleaning fired brass 101

[Harpoon1]

Good to know, this is all new to me.

To be fair, a difference in POI is not the same as a difference in “group size” (dispersion). I personally didn’t pursue it enough to make a statistically accurate observation with regard to group size! Many claim the difference in POI is irrelevant, noise, and has no impact on group size! I remain skeptical of their claim without proof, YMMV.