I heard that the lubricant for M-16 rifle comes from a derivative of bacon grease. When the bullet leaves the weapon there is a measurable amoount of porkfat on it.
The US Military is keeping it quiet but there is just no substitute that works as well.
(OK I really made that up- but it’s a great rumor to spread in Afghanistan, isn’t it? Until Odumbass publicly denies it at least)
Not so sure that the “pig-fat-bullets” rumor is such a good idea. That’s exactly what started the Seapoy Rebellion against Great Britain in 19th Century India.