Try using a " speedloader" . It is designed to hold the powder (pellets) the sabot and the cap all in one container.

I also have the same M/L and I swab it between every shot when at the range. When I get home, I then give it a good cleaning. I would probably hunt only one day with a dirty gun. Would a few days or longer harm the gun?...I honestly don' t know, but I would not want to ake that chance.