TexasCHLforum.com

Assuming an artery or bone is hit, yes, you need significant medical attention, and it might not be immediately obvious whether or not either has been hit. However, once it's been determined that nothing major was hit, yes, you can "heal" a GSW by stuffing things into it; that's actually what they recommend.

Specifically, packing the wound with clean, sterile gauze-type stuff, to soak up any gross stuff and keep the surface wound open, so the wound channel can drain while it heals from the bottom up, instead of skin down. This is basic wound care, and you don't need a doctor, or even an RN, to do it.

I have no idea if the tobacco thing would work, and I'm not really anxious for an opportunity to test it out.