A great gun; shoots well and handles nicely.
I did have a problem with end shake on the cylinder. I used to shoot a box of 357 magnums about every other month since this was my carry gun before I switched to an automatic. I used 125g JHP.
Smith & Wesson repaired the gun and the gunsmith there told me not to shoot it so much with the 357 magnums or it would have the same problem again. I switched to 38 +P and have never had another problem with it.
My only thought is that I don't like to practice with 38 special and carry 357 magnum. So now, when I carry a revolver, which is rarely, I carry a 642 with 38 +P.
I don't know if anyone else has had this problem, but the S&W gunsmith made it sound like it wasn't unusual and that the gun will not hold up to a steady diet of 357 magnums. He told me that you should only carry the 357, and do all your practice with the 38 special.