Ah, now I get it. Hmm.. Maybe the manual could be a little more clear about the formula. Now I recognize it's the basic Newtonian Gravitational Formula.

Now I see how to get my bullets traveling at the correct speed too. Velocity is independent of mass... It's just velocity, lol. It doesn't matter if you weigh 100lbs or 10,000lbs, 65mphr is 65mphr. Mass just dictates your resistance to changes in velocity. I also assume for something as streamlined as a bullet, very, very low damping should be used, to simulate its conical, aerodynamic shape. I also assume the velocity vector is in quants per sec? So if our scale is 10cm = quant, and I need my bullet to travel 800m/s:

800 m = 800 * 100 = 800,000cm <-- Lol, I'm so retarded (edit)
800,000 / 10 = 80,000q/s???

That seems extraordinarily high...

EDIT: Well, maybe it won't when everything is rescaled, which is going to be quite larger...