OK...I'm building my first 308 that won't be a safe queen so I picked up 500 rounds of 308 ammo. Drive about 400 miles and when I get home I decided to check it out. It has steel cases!!!! I don't know anything about steel cased ammo so is there anything I should be worried about if I just want to use the ammo to practice with and learn how to use the gun. I plan to get some good ammo but thought 500 rds for 200$ was a deal.