Twenty five yards. You won’t have trouble with the shot beyond that, but your pattern will always open up till you might not have concentration for a reliable kill.
Dualist 54 has a vid of shooting 2 oz from a twenty gage at a turkey head target. He got two or three shot in kill zone, but badly spread even though it’s a large charge at forty yards.
Another shot may have spread enough to miss or wound.
#2 is going to have plenty of kill power, well out to forty yards or more, but unless your gun is choked it just falls apart.
A shot cartridges may add a few yards, maybe 30 yards, but ml shot gun is short range.