This is a pretty cool test of brass cased ammo compared to steel cased ammo by Lucky Gunner Labs. I briefly looked through the test results and I saw some pretty in-depth testing done. Give it a look.
http://www.luckygunner.com/labs/bra...50f8-1/20/13-+NewsletterList&utm_medium=email
http://www.luckygunner.com/labs/bra...50f8-1/20/13-+NewsletterList&utm_medium=email