I am a Gun Culture 2.0 “native.” That is, I never participated in Gun Culture 1.0 nor in the development of GC2.0. I only know GC2.0. As such, the long-standing and curiously sometimes on-going “caliber wars” are irrelevant to me. 9mm Luger vs. .45 ACP vs. .40 S&W? Non-issue. 9mm is the official caliber of Gun Culture 2.0.
This is made plain in examining ammo sales in the recent coronavirus pandemic buying spree. Ammo.com has been publishing some helpful information in this regard. The most popular caliber by sales volume is 9mm in each of the 10 highest sales volume states.
The popularity of 223 ammo shown in this table also highlights that the official long-gun of Gun Culture 2.0 is the AR-platform.
The highest sales volume states are not surprising, except perhaps Illinois. What I find interesting is the extremely high % increases in sales in states like Texas and Florida and Arizona which presumably have very high baselines to start.
In terms of percentage increase (not considering sales volume), we see a lot of action in Vermont and Delaware, two of the least populous states. Of course, the same is true of North and South Dakota, but perhaps the residents of those states have already stockpiled ammo.