I came across this very interesting article on brass vs steel ammo. While I dont shoot steel and probably 90% of what I shoot (other than rimfire) comes off my reloading bench. But Lucky Gunner, who continually does a great job on putting together objective tests did a very good comparison on brass vs a couple different brands of steel-cased .223 ammo. It is very comprehensive and complete and thus is a bit long. However, even for someone who doesnt use steel ammo, I found the article and information very interesting.