I purchased 800rds of the stuff from the SFRC. Its listed there as Non-corrosive. I fired about 30 rounds through two SVT rifles and where ever the gas touched they frosted up two weeks after with a fair bit of rust. I contacted the SFRC and told them and they simply told me it is new production non corrosive. Even when I sent videos of the guns shooting that ammo, along with the guns rusted i received no reply. I even left a review on the ammo for being actually corrosive and it appears to have been blocked. I spoke to a few other people saying the same thing. The white box stuff is corrosive. That might be well known but I figured I'd atleast mention it before someone else does what I did.