That 230 KIAS must be a typo. 175 -180 ish was more like it. A bit faster if you had external fuel tanks on. Landing was still pretty speedy, based on 3000 Lbs of fuel remaining and full primary armament, final approach was 175 KIAS with touchdown speed at 160 KIAS. For every extra 1500 Lbs fuel add 5 KIAS. In the event of single engine 15 KIAS on top of that.
The top figure in the check list is for 12,000 fuel, 205 final and 190 touchdown.
Landing with that much fuel would not be the norm and would probably involve hot brakes with that much energy to dissipate.
Still have my original check list.