Thanks, jOe. Yes, I am seeing lots of large yellow oval flakes in the barrels and I just don't recall noticing that when I was using these shells years ago. But there is a lot I don't recall any more! The shot itself is okay, not the early brittle stuff, # 4 through full chokes. As to my shooting, I was doing alright with newer Rio Bismuth shells a month ago. It is the old No-Tox that leaves the barrels filthy and the more distant ducks unscathed, which made me wonder if the velocity of the No-Tox is low.
