There is no answer to your question. Some are exceptionally good, most are average, some are poor. BUT.... a 4" group sounds like sither something is VERY wrong with the rifle, or the shooter isn't very good at what he's doing.
I have an old (1976 vintage) M77 in .30-'06 that will shoot 3/4 inch groups all day long with my handloads, and will shoot any factory ammo I've ever tried in a 2" group or less.... usually about 1 to 1-1/2 inch groups.
I have an old (1976 vintage) M77 in .30-'06 that will shoot 3/4 inch groups all day long with my handloads, and will shoot any factory ammo I've ever tried in a 2" group or less.... usually about 1 to 1-1/2 inch groups.