The military is forbidden to used hollow point or other expanding ammunition.
Article IV, Section 3 of the 1899 Hague Convention, which specifically prohibits “the use of bullets which expand or flatten easily in the human body, such as bullets with a hard envelope which does not entirely cover the core, or is pierced with incisions.”
Although we did not ratify this Article, we respect it.
As to .223 being forbidden for deer hunting in some jurisdictions, I’ll defer to FReepers from various locations around the country...
.223 is indeed illegal for hunting in some jurisdictions. And forbidden for some larger game in many more.
IIRC they’re too small for deer hunting in WV.
I’m in one of those 22-caliber not allowed for deer states, and that includes any 22 caliber cartridge (223, 22-250, 220 Swift, etc). Silly in most cases, but whatever.
One of the reasons for the popularity of the platform is the ability to use a variety of different cartridges (albeit limited) in the AR15 platform. Only need to swap the upper, and the magazine.
Have a 6.5 Grendel for medium+ distances, and looking at 350 Legend for thick forest.