So cartridge on its side will allow primer when it goes off to pop out the back, and keep the brisance from igniting the powder against it?
Yes. I tested it and the primer leaves so fast there is not enough flame at the flash hole to ignite the powder.
HOW did you test it, Rich?
Good question, how would you test that?
I know they make kind of a pistol type thing to watch how they work as far as the flame goes, but not sure how to test a live round?