I have four 617's. Three are pre lock - one 4 inch and two 6 inch - 6 shot. My one 10 shot is a 4 inch drilled and tapped so it sports an Ultradot 30 and it gets a lot of shooting. One of the 6 inch has a better double action trigger and it also gets shot a lot. It is hard to pick a favorite. All are very accurate and I like and shoot them all. Given a choice and for similar dollars, I would buy the 6 shooter. They are hard to find now.