Don't be so rude to people not following your first post perfectly - your asking for help and advice, not the other way around. Also they more they likely did understand what you wrote, as you said it would be dependant on shot placement, out - what is "shot placement" is it bone based? Does each bone also have a map of vital organ and blood vessle placement attached to it (see THAT'S what they ment, cause 99% of the time shot placement is just head, chest, arms, legs)?
There are ten parts with part integrity scores (basically "limb health") and on each of them there are at least two mapped locations that inflict different special effects as damage is inflicted on them. So, for instance, if you're shooting somebody in the abdomen you have the base effects and multipliers in this area, and if you hit a kidney you'll get those effects and multipliers stacked on top of those. Although that said, most of the time you need a certain penetration factor (which is just penetration/damage division) to get a certain effect. For instance, you can't damage the heart at all without a PF of 0.4 or higher.
The ten parts are the "head" which includes the brain and upper skull, the "face" which includes the face and neck, the "chest" which is pretty self explanatory, the heart within it, the abdomen, the pelvis, the two arms and the two legs.
I feel when you actually go to impliment this - there comments will be much more helpful then your thinking. if a machine doesn't have hp, how do you intend to damage a part of it. Without recoding an hp for each part. Is it really logical to have a whole new monster class for non-organic life?
Vehicles still have part integrity, just not a base health score. Each part of a vehicle has integrity and damaging parts will impair it even if the part isn't completely destroyed. It's not too terribly hard to work with as long as your weapon can damage them.
Also it does matterif your users can tell how strong weapons are - who wants to have to run all the way back to noob monsters to make sure there new weapon can produce as much or more dps then their current weapon?
They should be able to guess simple things just fine. "My old rapier was only cast iron (not likely, actually) and this new sword is wrought iron, so this new rapier should be better overall." If that's all they care about, that's fine. Beyond that, the new info they get as they level and their character gets more of a sense for their weapon of choice
I think this method would be enjoyable, however I do ask - try and read what people say without getting upset that you feel you completely covered it in your first post. Even if where not the most apparently worthy of helping you out - this is one of the few game development forums and the people trying to help are actually one of a few dozen people with knowlege willing to freely give there time to help you achieve your goals.
You're putting words in my mouth. Also, please use spell check.