Piwo
Member
For what it is worth, I have a 6 inch Model 29-2 I bought new in 1979. I also have a 4 inch 629-6 I bought new in 1995. The 4 inch gun averages 50 feet per second faster across the board with almost all loads I have chronographed in these two guns. I believe the newer gun has tighter dimensions than the old. I also believe that with 4 to 6 inch or so barrel lengths that other gun dimensions are more important than 2 inches of barrel length generally speaking.
