Even a rigorous swabbing will slow the clock down on the barrel rusting. Like Sabotloader does shooting Triple Seven.. he swabs out the barrel I am sure at the end of the day, even if the rifle is loaded you can do that.

Pyrodex RS is some nasty stuff. And depending on what part of the world you live it can get down right aggressive in rusting a rifle. I clean after each day of hunting. I do understand that things can come up, and I am sure you will get the job done.