I used to think that a Dvorak keyboard was faster than a Qwerty keyboard. Apparently this is not true, I just read that Qwerty typists were able to match their previous speeds of typing on the Dvorak, but not surpass it. And training more on the Qwerty would make them ever faster, so Dvorak may be a waste of time. But it might be more ergonomic on the hands. UT Dallas Article A quote from the UT Dallas ariticle "He cites a 1973 study based on six typists at Western Electric where after 104 hours of training on DSK, typists were 2.6 percent faster than they had been on Qwerty.37 Similarly Yamada reports that in a 1978 study at Oregon State University after 100 hours of training typists were up to 97.6 percent of their old Qwerty speed."
The GSA (General Services Administration) did a study to see if August Dovark's original 1944 study was accurate, it wasn't. Another article. here
I'm still interested mostly in a left handed keyboard like the FrogPad

How fast does a bullet return to earth if you shoot straight up? It took me awhile, but here is what I finally found. Article
It depends on many things, but it looks like the come back at 240 feet per second, or 163mph. So don't shoot straight up.
Another good article here.
The thing that could be the biggest problem is not the downward speed of the bullet but it's horizontal speed. If it leaves the barrel at 2550 ft/s then whatever it hits, when fired at an angle, it will hit somewhere close to that minus the air friction. But you won't know where it will hit most likely. I remember in physics class in high school we found that shooting a projectile at a 45 degree angle gave us the greatest range. That could be miles I bet.