damage reduction

[moydock]

Is there something besides AC that reduces weapon damage done? Aside from parry/block type skills. I'm trying to figure out why a 3 dmg weapon @ lvl 1 hits for 3 max instead of 4.755 as it comes out in the max dmg formula. I set the mobs ac to 1 and i still hit for 3. Here's the equation and the math:

max_hit = (weapon_damage * (((GetSTR()*20) + (GetSkill(OFFENSE)*15) + (mylevel*10)) / 1000));

max_hit = (3 * (((75*20) + (5*15) + (1*10)) / 1000));
max_hit = (3 * (((1500) + (75) + (10)) / 1000));
max_hit = (3 * (1585) / 1000));
max_hit = (3 * 1.585);
max_hit = (3 * 1.585);
max_hit = (4.755);