Gallery Practice rounds used by National Guard and Reserve units were supposedly made on once fired brass. This used a 150 grain swaged bullet and pistol powder and would not have functioned an M1 Garand.
My understanding is that bullets, powder , primers and loading tools were available to Guard and reserve units when they had 1903 series rifles. Many guard and Reserve "Armories" included an indoor range consisting of a steel plate angled at 45 degrees. And you thought your high school coach got the willies over hard shoes on the basket ball court, imagine shooting over it.
The barely subsonic lead bulleted rounds were also issued for guard duty on occasion in 1903 days.
There was a set up like that for the Krag and the US Army had supplied reloading kits for use with the .45-70 after an outside primer was adopted.
I have never heard of Ball .30-06, 7.62, or 5.56 ammo being actually reloaded for training. Generally all that brass you were made to pick up got sold as scrap. Post salvage and sales treated it like any other surlpus item such as worn clothing or boots and placed it in lots for bids. About 1981 at Ft. Sill I seriously considered placing bids on 55 gallon drums of spent brass. I wanted the 5.56 and .45ACP....unfortunately every drum also had an unknown percentage of 7.62 and .50 cal in it.
I wish someone offered a swaged lead .308 bullet around 150 grains today.
-kBob