Wow, thanks for all the responses.
For those asking why I don't just relax, I have a reloading bench in the house, a shooting bench with 15 yard to 180 yard shooting range out the back of the house, and when I'm working up loads I want to shoot a string of 3 to 5 shots of each load and continue developing loads. Yes, I go change targets sometimes, or go feed the horses, or go collect eggs, whatever... but I always get back to waiting for the barrel to be "cool to the touch" between each shot.
I see nothing in the responses to prevent me from using the Coleman blower, so I'll see how quickly that reduces the "barrel cooling time". Thanks again