I find it odd to kill a "charging moose" in a neighborhood.  I've been hiking and taking photographs in the Alaska wild for 27 years and have been charged by moose more times than I can remember.  With a little dancing and dodging around trees in the woods is usually all that's required.  And, yes, I've always been armed and carry bear spray.  I've never used bear spray on a moose, let alone a gun... never needed to...