This debate will go on forever and with good cause. Personally I prefer not to use steel cased ammo in my firearms, I am meticulous about the care of my guns and prefer to use only quality brass cased ammo in them. Here is a link to an article on LuckyGunner.com that...

A: the simple answer is, it will still be illegal for a user of marijuana or any other Federally controlled substance to purchase, posess, or transfer firearms or ammunition. The ATF has been very clear on this and here is a link to the open letter to FFL's....