No less than 4" barrel in a .44 Magnum please!
SHORT barrels give up far to much in REAL, MEASURED velocity...and even the 4" isn't the ideal barrel length for the .44 mag unless one is handloading with the right powders.
If you want a "pocket blaster" that cares very little about barrel length to deliver velocity, then consider the S&W .500 magnum.

Not bashing...just sayin'