[Beagle8U]

If it were me I would be looking at some 7mm calibers. The best mix of range, accuracy, and stopping power.

Can be loaded in short chamber cartridges and would be only a slight trade-off in weight for carrying lots of ammo.

[Spktyr]

Yes, 7.62mm is a 7mm that works fine.

That said, anything we adopt would *HAVE* to become a new NATO standard, and getting the rest of NATO to agree on a new caliber when there's already one that effective in the catalog would be difficult to impossible. It's one of the things stopping 6.8 SPC adoption.

[mouser]

If it were me I would be looking at some 7mm calibers. The best mix of range, accuracy, and stopping power.

I have hunted antelope and deer with both the 7mm tcu and the 6.5 tcu using Thompson center pistols. the 6.5 with a 120 to 130 grain bullet seemed to be the better of the two.
these are just .223 cartridge with the neck opened up for 6.5mm or 7mm bulletts i would think either could be made to work in the current rifles the only problem with the 7 mm would be the very short shoulder.