Yay for a Sharpshooter win, and congratulations!
I may object a bit against stormbolters and GCB fired in full-auto mode. With SoG5, you cause a guaranteed knockback, which may in turn make you each of your bullets beyond the first. It's almost a non-issue with a storm bolter combat pistol, but full-auto GCB you can lose five bullets this way, and you have to reload after just three bursts. Spidey is immune to knockback, so you would not waste ammo against her, but the 2 seconds of reloading time make it much more effective to fire single shots. IMHO, if you feel safe as far as armor goes, Reloader may have been a better choice than Iron Man, but then again, Iron Man can make the late game more forgiving.
If you're lucky enough to find a combat pistol, I would recommend to assemble the White Death, as I call it - a P3B2 combat pistol. 230 DPS, sustained for two and a half seconds, just can't be equaled. It's enough to kill a Cybie in a single clip.
Oh, and your firing speed with SoG5 should always be 0.1s, and the equation you posted is correct.