Anyway, the muzzie victim would have no way of knowing he took a round with pig blood/grease, and thus there would be no purpose.
That's why you advertise, so they'll know. After the first group of 'em falls afoul of the Soul Stealer's. :) The reverse, a rumor that pig fat was used as bullet lube, worked against the British, when the British East Indian (old sense, India, Pakistan and Bangladesh today) Army was fighting in the Hindu Kush against the Afghans who were egged on by the Russians (pre Soviet Union). That was when you had to bite the end off the paper cartridge, pour the powder into the barrel and then ram the bullet in above it. This was in 1857, the rifles were Pattern 1853 Enfields
http://en.wikipedia.org/wiki/Sepoy_Rebellion#Tallow-greased_cartridges