I shoot my 625 4" in IDPA and USPSA matches and have a HOOT with it and lots of moon clips.
I'm not a speed demon, however it is not often I have rounds out of the A zone or down zero.... Just love hearing the RO call out All Alpha or down Zero over and over again!
RO's just love the big holes next to each other and the brass monkeys enjoy picking up MY brass!
Randy