Mossberg makes a good shotgun. It is hard mess up such a simple weapon design. I would recommend using bird shot loads instead of buck shot for inside the house. If you have family in the house with you, that is. The bird shot energy will be dissipated in the walls and less likely to penetrate, causing injuries to the ones you are trying to protect. A direct hit on a grown man with bird shot at the ranges you are dealing with inside a house will knock him down hard. If you are living alone, then buck shot is just fine. I like to mix buck shot and slugs, just in case you need even more penetration.