Welcome to reloading, selway. You'll find it so enjoyable that you may end up not knowing if you reload so you can shoot more or shoot so you can reload more.
As others have indicated, you need to be very, very careful about using range brass for reloading rifle cartridges. The industry standard operating pressure for the 30-06 Springfield is 50,000 psi. A ruptured cartridge, especially a case head separation, can cost you your rifle and perhaps some treasured parts of your anatomy as well. I routinely pick up range brass for my .45 pistol, which operates at less than 20,000 psi and allows me to get a good look inside the brass as well, but I won't use any rifle brass I'm not absolutely sure has only been fired once, and usually not even then - it's just not worth it.
You can buy 100 pieces of nice, new name-brand unprimed 30-06 brass for 30 bucks or so and then you'll know exactly what you have. If you take care of them, not setting the shoulder back any more than you need to when you resize (or even better neck size if you can) they'll keep you in business for so long the initial investment will be forgotten. Don't forget to measure the overall length before every reloading and trim when necessary - keep track of how many times you trim and discard them after a half dozen or so trimmings.