[Grouse]

I would say 10mm has a much smaller following. It think it would be fair to say 9mm, 45, and .38/.357 fill load out of defensive handgun calibers. rounds like 44mag, 22lr, finish out the defensive/practice rounds.

What is left is the more niche rounds like .380 .40/10mm, 41 mag, 327 mag, 50 AE, 454 casull, 45LC, .460 and 500 are superfluous and really not in the mainstream. Yes they produce guns, and ammo to small degrees. Never will you see it on the scale of even .38/357.

During the ammo crisis after the school shooting. I scored 40sw for 12 bucks per 50 and 10mm for 17.95 per 50. All when 9mm was going for 30 per fifty and 45acp for 35 per 50 all for 115grn rn, and 230grn lrn. another one was 9x18 mak, i picked up 1000 rounds for 179 shipped

In that alone i see some validity to have an odd ball caliber or three. It allows me to shoot, and practice when price spikes would lower my range visits.

I would like to see a break down of ammo manufacture by caliber across the US, the cross reference that with production numbers of guns by caliber. It would be an interesting way to see the metrics on what is and is not mainstream in the US.