The only time I avoid shooting corrosive ammo is when I don’t feel like cleaning rifles the same day I shoot them, has nothing to do with how pristine the gun is. In fact my one sks is a beauty, it looks the same as it did when I bought it and it’s only ever shot corrosive ammo. It’s not the boogeyman some people make it out to be, the primer leaves a salt residue behind and not acid or anything that’s actually corrosive. Flush it with water and clean as usual, oil and you’re done. It’s simple, real simple.