Check this out if you want to get some good data on brass cased vs steel cased ammo.
http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/
I've only read some of it but so far it looks like a good test.
http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/
I've only read some of it but so far it looks like a good test.