I bought a 340PD yesterday and tried it out on the range today. I've been wanting one for quite some time. I love the light weight and rustfree contruction. I have the Hi-Viz sight and I think it is an improvement over the standard blade front sight.
Seems quite accurate with .38 +P ammunition, but using .357 Magnum is indeed a challenge. I had a hard time keeping it in the black with the .357 and you can feel your hand after firing a few cylinders worth. Seems like it could become my main carry gun. My only complaint is I wish it came in Bodyguard style. I had no bullet pull problems with Federal Hyra-Shock or Remining Golden Sabre ammo. I seemed to shoot better with the Remington, not sure why.
A great gun all-in-all. Can't be beat for power, weight, reliability, and concealability.