If I recall correctly, you can also use them to increase hit% for bombs? Can anyone confirm that?
It seems to me that in attack mode the bomb damage is basically totaled for the entire sortie, and then divided by the number of bombs your plane initially carried? If that's the case, then if you re-armed four times with a plane initially loaded with one bomb, and every time you dropped that bomb (4 times) you hit your target, you'd be credited with 4x the damage. Instead of that resulting in a 100% hit%, it's be 400% hit%, right?
It's been a LONG time since I paid attention to how things really score, so I could be wrong. Somebody please jump in with the facts...