AGM-154 JSOW drag realistic?

[LeCuvier]

With 4 JSOW's under the wings, I can hardly exceed a speed of 300 kt unless I use afterburner, even after transition to level flight at about 30,000 ft. I need to fly with afterburner for quite a while in order to reach 400 kts, which seems to be required to pack enough energy into the JSOW so that I can launch from a safe distance when I attack a S-300 radar battery.

 

Is the drag of the JSOW realistically modelled?

[Ghostworrior]

400 KIAS at 30.000ft is roughtly 640 TAS so whats the problem?

[Preendog]

JSOW drag is bad but not quite the worst:

 

https://forums.eagle.ru/showthread.php?t=245521&highlight=jsow