rebs,
When the Army is in the field, the last thing that they want soldiers to do is carry reloading gear.
One of the reasons the army went to the 5.56x45 to reduce the weight of the .308 rounds soldiers were carrying.
Lake City isn't a commercial manufacturer.
Lake City is a Government facility run under contract by Federal to make Mil Spec ammo.
Some calibers are manufactured with crimped primers.
There is nothing to keep you from reloading Lake City brass.
If you find crimped primers, swage them to remove the crimp and load away.