Nice gun Dan!,
Seems the long barrled .357's get forgotten a bit as people tend to move up to bigger calibers if they want a bigger gun.
The 6" 586 was my first pistol. When I shot one again for the first time in some years I was surprised how much nicer it was with full power loads than my 4" guns. Also from the numbers I've seen the 357 is one cartridge that REALLY likes every additional inch of barrel it can get.