Recently, a Ruger P85 came into the shop for the gunsmith to get a case that was stuck in the chamber out. I went in the back to get something and stopped to help the gunsmith with the pistol. While rodding the barrel to see if we could get the action to pop open, a flake came off the inside of the barrel. I immediately poured it out of the barrel into my hand. It was a lead flake as thick as a business card edge. I immediately tested it to see if it was lead and it was. I then turned over the pistol and saw the frame was cracked in two places above the slide release pin that holds the barrel in place.
Kaboom gun.
The gun was toast. Turned out he was shooting a bunch of remanufactured ammo with lead rounds he bought from a gunshow. Ammo is hard to find right now, but if you are buying iffy stuff to shoot, watch yourself and pay attention to what it's doing in the gun. Check cases for overpressure. Check the barrel for leading.