Picked up two 638's a couple of years ago when Illinois was
finally strong-armed into issuing concealed carry permits, that was a long time comin'.
One of my acquisitions was for my other half, simplicity in operation, no worries about "failure to feed", easy concealment,
it's a no brainer. Loaded with "FBI loads" 158gr. soft lead HP's.
She shoots it more than well enough at 7 yards.
Light, small, and stone reliable with that load for summertime carry, I don't feel compromised carrying it.
I collect firearms as artwork, but I also keep a set of them as tools.
A 638 is a fine example of one of the tools.