SpudQ2 - I was in almost the same boat you were in. I collected the spent blank brass from the M-1A rifles used in ceremonies.
I thought if I ever got in to reloading, I would be ready to go. I was told the brass was great for reloading because it had never been stressed.
Like mentioned by Briandg, there are problems. One of the biggest is that when you get the case neck opened enough to reload, it is either to short, or cracked. The primer holes are there, just not where they belong on most of them.
I ended up taking an ammo can full of brass to the recyclers and using that money to buy virgin brass.