Remington 870 w/ a Hastings Cantilever full rifled barrel. I just put a Nikon 2x7x32 along with a Remington Sure Shot Stock this year. Tested different slugs and the best was Lightfield Hybred EXP 2 3/4". I was able to get a 3", 5 shot group at 100 yards off a bench rest. I was very happy with it.