more insight from LEE tech services
Well, I had to ask why I couldn't send it back (even though I obviously don't need to) and here was my response:
Before I saw the picture you sent I envisioned the cartridge stuck all the way up in the die, in which case it would be different than live ammunition because it would have been contained just like a round in the chamber of a gun. If loose ammunition goes off it's not particularly dangerous because the cartridge case can't contain a great deal of pressure. It just goes "pop" and the bullet goes a few feet. But if the cartridge is contained inside of a steel die it will go off just like if it were fired from a gun.
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