If you are just looking for something to indicate if you hit it or not, and just using bird shot, make a T shaped bar and hang 5 or 6 lengths of about 6" long heavy chain.
If it swings, you hit it. if you were off center, only half the chains will be swinging.
No resetting.
Or, if you are practicing for competition, make up targets you will likely see.
AR500 isn't necessary for bird shot.