No, this is not what you're thinking it is.

I'd like to create a new way of rating a character's ability to soak up damage; we'll call this a character's "tank rating" for now. Eventually "tank rating" will be expressed giant-spreadsheet format, with Body on one axis and Ballistic Armor on the other. Each entry would be one of two things: 1) %-chance for the character with X Ballistic armor and Y Body to fully stage down the damage from a heavy pistol shot with an average skill (3 to 4). 2) %-chance for a character with Ballistic armor and Body of ratings X and Y respectively to stage down Z damage, where Z is something like 7D. I have some basic idea of what mathematics needs to be done, but lack the knowledge/experience to implement any of it. So, here goes.

For option 1, I imagine the math to break down something like this. Calculate rate of failure against a certain TN (in this case the power of the attack modified by applicable armor) and multiply the result by the character's Body to get average number of failures per roll. Body - (result) should get you average number of successes per roll. Then, <insert crazy mathematics to convert number of successes into %-chance to completely stage down damage> and then you'll have a way to express how often you can shrug off getting a cap busted in your meaty self.

Option 2 seems like it would be quite a bit harder and, to be perfectly honest, I have no idea what would go into this kind of math. The ideal end result would be some formula or expression in terms of actual character attributes multiplied by another expression to represent the power/damage level of the original attack. This way doesn't seem all that feasible. If someone can figure it out, though, that would be awesome.

If you've read this far, I'm sure you're starting to wonder, "What is the point of all this?" Well, my friends...game mechanics-wise, there is absolutely no real applicability. It will mostly be used as an excuse to brag about your character. I'll also probably assign humorous, qualitative labels to the diffferent ranges of percentiles for some comedic value.

Anyway, that's what I want to happen. Thanks in advance to any who attempt this.