I have a 629 that is back to S&W for the 3rd. time. I had new barrel installed after an obstruction that "ringed" the 8 3/8 barrel. They replaced it with a 6 in. This barrel shoots extreme left. To center the shot at 15 yds. it requires rear sight to be extreme right position. S&W told me this is within acceptable limits. This issue happened in their shop. My old ringed barrel NEVER shot left, even after incident. I now have a $1000.00 paper weight. What could they have done in their shop to cause this issue? I told them this is totally unacceptable. I verified this issue with two other competent pistol shooters.