LtZack, it looks "good". However, any person who has touched the Particle System knows that that effect is just NukeMushroomExplosion from ParticleSystem.ini.
Change sizerate to SizeRate = 90.00 90.00 or so and change lifetime to Lifetime = 1200.00 1200.00 or so plus alter the colors using Color1 = R:86 G:86 B:235 0 and so on for Color2, Color3 etc and so on and voila, a massive hemispherical spheroid that takes up most of the screen! I know this cause i used the effect plus numerous others to create my US Minuteman III Nuclear ICBM.
I would try to add some more ParticleSystem FX to the weapon in FX list, as to anyone who knows the particle system your bomb looks pretty dodgy..
