Juskimo, no kidding! Now YOU need one. I want one but don't need it. That'll be too cool. 50% more power than a 44 mag.
I figured the TKO on one...TKO = grains*velocity*diam./7000 (KnockOut Power essentially)
TKO for
..................muzzle.......at 100 yds
.357...............10................7
44 mag..........21..............12
30/30.............15..............13
.308...............19............16.5
.454...............30..............22