Show the loadout then. I bet you don't have half the stuff that it needs if you can haul 730tUm...no. T9 can carry 758t with size 5 shield, Cutter can carry 730t with size 6 shield (or 762t if you are lucky and have a legacy engineered size 5 shield with +10% optimal mass), Anaconda can carry 454t with size 4 shield. Even the Corvette beats that with 586t and size 5 shield.
Plus, fully loaded with 730t, what's the jump range? Can it even make it to the next nearest system?
I managed to get just over 600 by sacrificing the shield, remember that two of the bays are military bays and can't take a cargo rack. Fully loaded with cargo and a class A FSD, it could only do a little over 10Ly.