I buy Tula Ammo (appears to be the same thing as wolf, but in a differently marked box) at walmart to use as 9mm plinking ammo. Now what I'm about to say may offend some of you. I do not clean the bore of my pistols after every range trip. I clean them after every 100+/- rounds fired. I shoot about 50 rounds through each pistol during a range trip, so I'm cleaning my pistols, every other trip. On Sunday night I decide to check out my C775b. Its was currently loaded with my carry ammo, so I drop the mag, clear the chamber, and use a light to inspect the bore. Scary sight! I saw light red surface rust starting to form in the barrel, starting at the muzzle and going in approximately 1 inch. Needless to say it pissed me off. I cleaned the heck out of the pistol, and now the bore is mirror bright again. I caught it before any damage could be done. I checked my other 9mm pistol, and its bore is clean. Will I stop shooting the cheap steel ammo? Probably not. but I'm going to start cleaning the guns that do shoot it after every range trip. And I wont put much faith in that "non corrosive primer" text on the box either.