.327Fed as a carry or duty round; US made revolvers...
I highly doubt the .327Federal or .327Fed load will see increased use as a concealed carry or duty round as time soon.
To even locate a documented use of force event with a .327Fed round would take some effort.
Over time, a few(and I mean a small #) of armed citizen or maybe sworn LE incidents with a DA .327Fed revolver may occur but most self defense or protection uses will be based solely on the caliber's specs or documented ballistics.
Now, don't get me wrong, Im not saying the .327Fed revolvers can't work properly, Im saying it will be years before a solid base is really built up.
The .357magnum, the .38spl +P & the .44spl are all proven man-stoppers.