There has been some work done in recent years on recreating the .38-44 High Velocity which would let you use .38 Special brass which is cheaper and ejects .135" quicker.
I've experimented with those a little. One load that I like (no idea about the power factor) is a 148 grain DEWC over 7.0 grains of WSF and loaded long in .38 Special brass (I'll have to measure one and get back to you.) They work great in a .357 but won't chamber in a .38 Special.
ETA: I just measured a few: 1.365" OAL. They eject faster because of the short brass, but they don't load as quick from a speedloader as SWC or RN or HP bullets