The .277 Fury in the higher pressure 80,000 psi composite three piece case eats barrels. To avoid this, the Army intends to use the lower pressure (and velocity) all-brass version of the .277 Fury for training purposes.
Which means that the sighting zeros will be vastly different between the two cartridges, the recoil is vastly different, and the training received with the lower recoil .277 all brass ammo will be less useful and meaningful when it comes time to use the full power .277 composite cased ammo in battle.
As a result, the .277 Fury will end up being a specialist weapon (designated marksman, etc.) while the rest of the regular troops will continue to use weapons chambered in the 5.56 NATO cartridge.
Not really, Sight in at 50 or 100 yards wont change noticeably at all, drop at 300 yards and beyond is different but predictable
... the recoil is vastly different,...
Why? its still a buffered system. Do you feel any significant difference between a lower velocity .223 at say 2400 ft/s and an M193 5.56 round at 3200 ft/s? I can tell but it doesnt affect how I shoot.
and the training received with the lower recoil .277 all brass ammo will be less useful and meaningful when it comes time to use the full power .277 composite cased ammo in battle.
I disagree, but thats my opinion.
As a result, the .277 Fury will end up being a specialist weapon ...
This may be true. If not, its just going to cost us taxpayers a whole lot more for the expensive ammo. With the proliferation of body armor, is it worth it? It may be if thats what it takes to be more effective on the battlefield.