Can you imagine walking in on someone when they are performing this test!?

Gee, it would be awfully difficult to explain. You would probably suggest putting them on the 24 hour suicide watch!

Meanwhile they would be screaming---"I was just testing my gun like they told me to do on the internet, is all!"

However, and joking aside, it does seem like a reasonable low cost field test.........

Thanks for the recommendation, Bonanza.