I have a 223 Handi Rifle Heavy Barrel for coyote hunting. Haven't shot one with it yet, but that will come. I really like the gun and look forward to the weather getting nicer to do a little more paper shooting.
Many of them need a trigger job, but you can easily do that yourself. I took mine down to a very nice, crisp 3 lbs.
Check out the graybeardoutdoors.com forum. There is a TON of information on that site about the NEFs/H&Rs.