I don't know if it's a fine line between self/family and stuff. You can't shoot someone if they break in and destroy your dresser. I think it's more of a fine line between just how much danger you face. For example, if you kill someone in your house and there's suspicion as to how in danger you actually were, you might get arrested in Nebraska. But, you could end up being cleared and/or serving a minor punishment.
The reason I bring this all up is because I don't think Nebraska law works in favor of having large magazine rounds and being able to fire warning shots in defense of your home. My interpretation (and based on what I've heard from other gun owners in the past) is that firing warning shots could make you guilty of firing a weapon in city limits at a minimum, perhaps all the way up to attempted manslaughter.