I also have the H&R Ultra slug hunter deluxe. It's by FAR the most accurate slug I have ever used. Iown and have hunted with a Remington870 w/rifled barrel and a Mossberg 695 bolt action slug gun w/rifled barrel. Neither are as accurate as the H&R. Mine likes both the Winchester Supreme Partition Gold Slugs: 380gr 1900fps and the Winchester Platinum Tips: 400gr 1700fps.
I prefer and have it sighted with the Platinum tips because I feel they have better stopping qualities. It's topped with a fixed 4 power Nikon scope. It's deadly out to 150yds. It will kill out to 200yds but the slug really starts to drop at that range. I have killed deer out past 100yds with absolutely no problem and my furthest to date is a 143yd (range finder)that deer went 50yds and dropped in sight. The slug went right through (double lung). I would not even think twice about a 150yd shot.
It's not whatI would call a"carry gun" as it's very heavy.This helps with the recoil though. I removed the recoil pad and took out thesteel "tube" that'sin the stock. I feel it's heavy enough without it and have not noticed any more recoil. It will lighten up the gun about1-2lbs I use a sling that has 4 shell loops in it for easy access to additional shells if needed....so far that hasn't been the case.
Here is a pic.