Ken, you are correct, and when I originally posted said statement, and being a reloader myself, I was refering to that gentleman who had shot thousands of reloads and factory rounds out of an old gun before proof. It is like he stated "just because a shell fits a gun does not mean it is safe to use" That has been my whole point right along, I just referred readers to that one particular case to make a point.
So when someone comes on the board saying that bizmuth was made for older guns that cannot handle steel and not being specific, then I have a problem with that.
Like I said I won't be shooting shells not designed for my old guns and definetly not longer shells in a shorter chamber.

David