I have a H&R pardner, maybe it's a topper, ? .410 knocked tons of stuff down yrs ago with it, squirrels, rabbits, grouse, (turkeys

) knock a squirrel out of the tree at 50 yrds, little shell but you wouldn't want to be any closer or with the full choke it'd be peppered.
Have .10 gauge H&R also with a full choke turkey gun, surprised it doesn't kick, heavy barrel and a solid chunk of steel fits right in the hole in the stock.
I know many that have scored with one of them 12 or 20 gauge on deer, but I wouldn't recommend it. Foster slugs are made for smooth bore fit tight and spin good and I use them in my smooth bore pump slug guns. H&R/ New England firearms make some nice fully rifled heavy bull barreled rifle sight equipped ready for a scope barrels that saboted slugs are deadly. And screw in extensions for the thumb hammer, makes it much easier to cock.