Thanks for a good discussion and following the tangent with me. I created a couple of squibs for my own learning, and only then thought of some potential issues. Training uses a lot of rounds and can be an appropriate scenario to use one’s own loads. In directed training one is expected to perform various clearing exercises. That’s where the issue could arise.
Your welcome and also thanks. I enjoy a good shooting related discussion and when I hear other perspectives, I get to go back and think through what “I think I know” as well. :)