B777 Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 189; Flight Crew Total 22618; Flight Crew Type 1617
Confusion; Distraction
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Weight And Balance
Flight Crew Returned To Gate; General Flight Cancelled / Delayed
Company Policy; Aircraft
We got the takeoff data after pushback. I noticed the percent of MAC (Mean Aerodynamic Chord) to be unusually high; 36.4%.  The CG produced a takeoff trim of 3 degrees; which was way out of the GREEN band for stab trim.I called the dispatcher and also had the load planner on line. According to the load planner 'it is a new procedure and we don't worry about the GREEN BAND'.  I then conferenced in the [Flight Operations Manager] and the [Operations] manager. [Operations] manager repeated what the load planner said; we don't worry about the GREEN BAND. I was not going to taxi the aircraft to the runway and get the takeoff warning due to the trim being out of the GREEN BAND and reject the takeoff. Or; just pick a random trim setting and takeoff.Around that time both of us timed out and brought the aircraft back to the gate.
B777 Captain reported a center of gravity anomaly prior to taxiing which could not be resolved to satisfaction.