This might be common knowledge, and/or inaccurate, and yes I'm very nerdy.

Afaik, armor takes 2/3 of the damage, health 1/3. I was wondering how exactly these values are rounded. I put down a table with the values I remember (though some might be wrong).

Update: wrong table removed.

I compiled this table making two assumptions:
1) The Armor damage values are computed by multiplying the damage times 2/3, rounding to the closest int (this is actually wrong, see #2). The armor protection is then ADMG/ DMG.
2) The AP is computed per shot.

This scenario biases low damage weapons (MG and LG, maybe SG, if it's computed per pellet). According to the table MG deals ~6% more health damage, and LG (and SG) ~5% more armor damage, compared to the others weapons.

Is this really the case?

Update: The correct table should then be this one: