I was a Bullseye shooter up to about 18 months ago but had to stop because of an injury. The arm is all better now and I would like to return to shooting, but would like to try revolver work this time. My current plan is to get a a 617 and 625. I know the 625 is a 4" gun, but I believe I have the choice of getting either a 4 or 6" barrel for the 617. I would rather get the 4" barrel, but was curious of anyone else's experience and whether there is a great advantage to the longer barrel.