What I like about the .327 mag. in an SP101 is that I can also load it with
.32 H&R or .32 Long. In some scenarios where one is worried about noise,
flash and overpenetration - the .32 starts to look like a good choice.
The .32 H&R overlaps .38 performance and the .327mag exceeds .38+P
performance...
Then consider three double-taps from a .32 SP101 six shooter as opposed
to a .38SP101 five shooter...