Hi Mike, I've done it, but don't recommend it! And since then, I have had dummy rounds made up as well. The reasons for NOT using live ammo ever for testing function is simple, we are human! And, back and forth arming and disarming the gun leaves a potential window for disaster! One in a million, still not good enough odds!!!...
... I always, ALWAYS, use dummy rounds, (made for me especially by ruff) AND, I have a dedicated test Luger (for testing mags and drums!) with the firing pin assembly rermoved. Hope this helps with your testing proceedure in the future... best, til...lat'r...GT...