My question is more along the line of safety. I guess any loaded gun is dangerous enough. I was reading a thing that said not to carry a primed flinter because it is too dangerous. I guess it depends on the person. As far as leaving the barrel loaded, I would be OK with it for a day or a week maybe. Though I'm going to ask Santa for a CO2 discharger for Christmas this year!
I heard if you put a sock over the barrel you can catch the bullet for future use.