Urban Myth, fire a box of (place ammo here), clean your pistol. Fire a box of Tula, clean your pistol. Did you notice any difference in your pistols appearence between brand X and Tula? I dont think so.
I would not shoot it in anything of any value. I wouldnt hesitate to feed it to a glock or anything designed to shoot steel cased ammo like an AK or SKS.