These are the guys who I would really take it from though:
GARRETT'S 44 MAG HAMMERHEAD AMMO
$70 / 50 CTGS
330-GR SUPER-HARD-CAST GC LONG-HAMMERHEAD AT 1400-FPS
THIS 44 MAGNUM AMMO IS RECOMMENDED FOR USE IN RUGER AND DAN WESSON DOUBLE-ACTION REVOLVERS, AS WELL AS THE
TAURUS RAGING BULL. IT IS ALSO RECOMMENDED FOR THE GARY REEDER 5-SHOT ULTIMATE 44 MAGNUM, AND THE JOHN GALLAGHER CUSTOM LONG-CYLINDER RUGER SINGLE-ACTIONS. THIS AMMO SHOULD BE FIRED ONLY IN THOSE RECOMMENDED REVOLVERS! THIS AMMO IS BOTH TOO LONG AND GENERATES TOO MUCH CHAMBER PRESSURE FOR SAFE USE IN S&W AND RUGER SUPER BLACKHAWK REVOLVERS. IT IS ALSO TOO LONG FOR USE IN THE FREEDOM ARMS REVOLVER.
ENERGY: 1440 FT/LBS; TAYLOR KNOCKOUT VALUE: 28; MEPLAT: .320"; CHAMBER PRESSURE: 43,500-CUP; SECTIONAL DENSITY: .255; TRAJECTORY: +2" @ 50-YDS; ZERO @ 100-YDS; -7" @ 150-YDS
information from:
http://www.garrettcartridges.com/products.asp