Hello, I recently purchased a mossberg 500 field deer combo 20 gaugeand I have a few questions. I havent shot through the rifled barrel yet but. First off what sabot slugs would people suggest for deer hunting? how far can one realistically take a deer with a 20 gauge riffled barreland sabot slugs? should I buy a scope or are the rifle sights that came with it good enough for as far as it will shoot? Finally, for cleaning and care of the gun, I usually just clean throughout the barrel with brush and cloths, wipe down the outside of the gun, and lubricate the rails/action, however the book talks about doing a dissasembly including taking the trigger off and what not. Do I need to take the trigger off and clean something.