RE: 870 w/slug choke ???
It really depends on your sights. If it is a bead, probably not. If you have rifled sights or a scope, it might do better. I used to have an 870 with the rifled choke, and with a scope, it printed 4 1/2" groups at 100 yards with sabot slugs. (Remington copper solid if I remember right) Not a tack driver, but definitely minute of deer accurate. Good luck.