But since this is old commie ammo, it does come with some caveats. Chief among them is that it is corrosive. Its Berdan primers will create corrosive residue upon ignition, so you’re going to have to give your rifle a little extra TLC while you’re cleaning it. Secondly, this ammo’s 148 grain full metal jacket projectiles do contain steel, so they will attract a magnet. Finally, this ammo’s cases are made of steel and accordingly aren’t reloadable. The cases are lacquered for increased protection against moisture and humidity, however, and they contain clean-burning powder.