i was just wonderin cuz that guy said that misshapen shot had been scratching barrels
Here is what I posted in the hevi-shot thread. The scratched barrel story was told to me by a shop owner and not a personal experience.
Here are some photos of a hevi shot shell I opened today. It was a size 4 20 ga magnum shell. I still have a couple of boxes of this stuff. This is pretty typical of the 5 or so I have cut open to show to friends etc.

Full of pits, burrs, out of round and snowman pellets

More of the same

This was the biggest and smallest pellet in a size 4 shell

these are the worst offenders in the shell. One was three pellets stuck together and many had burrs or what I like to call the snowman effect.
Now I have never seen a shell that had a "burr" that was outside the wad where a barrel could be scratched and have not had that experience myself (only told stories of it from a shop guy) but at a minimum with the inconsistency in the shot size an lack of round pellets I can't imagine it would make for good patterns.