Considering the time it will take to get a new caliber (and maybe new rifle) out to the troops, I’ll stick with whats most available… and cheapest. That would be 5.56. .223, 7.62X39, and 7.62X59/.308. Nine millimeter, too. I can’t afford buying a new wardrobe whenever styles change nor a total weapons makeover because of one new caliber or another.
