How'd you work out 177 mils?
I'm seeing for 400 KTAS release, assuming full load, roughly
ZSL AoA = 56 + 16 + 0 - 35 = 37
Sight depression = 37 + 183 (from Bombing table, 0 degrees 400 KTAS 400 ft release)
= 220.
Edit: I guess flying at 480 KTAS with a lighter load will be about closer.
ZSL AoA = 5 (centerline store and sidewinders, assuming 18000 lbs)
Sight depression = 156
And for 440 KTAS with a full load
ZSL = 15
Sight depression = 186