TulAmmo is just dirty Russian junk if I remember right. "Dirty" doesn't necessarily harm the gun, just affects its reliability during that shooting session by gunking up the actionable parts.
That particular brand I've found to be no worse than Blazer brass crap.
My LC9 ate up Blazer and spat it out like a champ all day. I won't put that garbage in my guns anymore tho, it's not worth the dollar savings to me.