Just wondering what you are starting this collection for. I would think, that for safety's sake, it might be wise to make the collection with dummy rounds. Spent primer, no powder but with a seated bullet. You would still have the collection and to me it would be a collection that could be shown without worry that someone who does not have knowledge of the care that loaded rounds need. As a scout leader, I made such a small collection for the scout troop and was not worried that a scout may take a loaded round out of the collection. It's better safe than sorry.