Hay guys. Just curious what your thoughts were. My dad has a little single-shot/double-barreled derringer in .22 magnum. (So it works like a tiny superposed shotgun, KWIM?) Anyway, for some reason years ago I thought he said it was unsafe to shoot just a regular .22lr in it, perhaps because the chamber is throated for .22 mag. What are y'all's thoughts on the subject?