If you don't fire it, there is no need to clean it. Pulling the load and starting fresh in the morning is a good way to do things. Just make sure you pop a couple caps through the rifle each morning checking to make sure you have a good fire spark making it through the channel... Youshould be all right.

Personally it would not hurt if you ocassionally after dumping the load, swab the barrel out with some alcohol and maybe run a patch with some oil down the barrel. Just to make sure all is staying well in the barrel.