I've been a vegetarian for more than half my life. The concept of needing meat to complete a meal is so foreign to me at this point, I can't really wrap my head around it.
An interesting question ... After some thought, I'd say that guns do indeed work in areas of high magic. As much as I hate to admit it, I think a gun would beat a spell in a duel unless the caster was able to forego the use of a spoken word.
It's highly unlikely that would come into play in this particular roleplay though, as our setting is pretty much exclusively focused on Hogwarts and Hogsmeade. Not a lot of muggles around.
But if a character happens to get themselves into a really bad situation (like a duel with 5 Death Eaters) I will contact their writer about the possibility of death. Realistic danger will result in realistic consequences, but I would never blindside anyone with death or serious injury.