617 D/A trigger pull issue?

[ballbuster]

I just purchased a 617 no dash in what appeared to be great shape. Got the gun today and noticed when I start my D/A trigger pull I get a click and can feel it in the trigger. Its like a 1/4 way through the pull, the hammer pulls back a little and then right before the cylinder gets ready to turn I hear and feel a click. If I pull the hammer back manually I do not feel it...I don't know if i am explaining this correctly or not. I have many other Smith Revolvers and none of them do that...Pistol is functioning correctly besides this...

Any help would be appreciated.