Picked up a box of GS9MMC while I was ordering fishin' stuff since I haven't had any HD ammo around. I tend to not have any other ammo around, target ammo included. I'm getting into shooting for the sport, and having the HD weapon is the icing on the cake, but obviously it does me no good if there isn't a single bullet in the house, so let's fix that. Anyway, I see the case isn't brass in appearance. So, a few clicks on the internet and I find that the "case is nickel-plated", but nickel-plated what? I remember somebody posting that steel-case bullets ruined their barrel or extractor or something like that. I'm probably being paranoid, but anyone know what the base material of a GS case is?