Fallout Tactics damage formula.

I'd like to modify some FT ammo/armor/enemy stats to be better balanced. I'm using this damage formula, but unfortunately the Excel sheet calculated values is often different then in-game results. Is there any other parameters then armor DT , DR and ammo Damage Modifier, Armor Penetration that can have an impact on the damage inflicted on the enemy (besides the weapon specific...

Fallout Tactics damage formula.