So... Lets say you use compressed air. Is that of value?
Does the compressed air need to be bubbled through water to pick up moisture?
Does anyone actually believe that blowing "fresh air" into the barrel before loading really affects how the powder burns for the next shot?
Yes, now I'm playing the troll card, but they are valid questions.
So far the only legitimate point that can be proven is that it could help clear the flash hole or nipple. And something that I could see if using DIY percussion caps like we are kind of being forced to do.