I dinnae about the point values.. but here's some info on the bombs.
Acks - 100lbs
fuel, ammo, barracks, tower (at field), city buildings, buildings at factories - 400lbs (found that 4 100lb eggs would kill these when there was a bug that dropped 4 eggs for each hit of the pickle)
HQ - 10000lbs
Basically, unless you're only planning on killing acks (or making multiple passes or using .salvo 4) load 500lb eggs.