Weird hammer behavior on 686 Performance Center

[Anton Chigurh]

So I bought a used 686-6 PC 7 shot. Very clean, everything functioned well. I wasn't thrilled with the Hogues and replaced them. Not a big fan of the nubby service hammer either. Obtained an appropriate target hammer from Midway, and sat down to swap them out. I expected, at minimum, to have to also swap the double action sears, but was pleasantly surprised to have a "drop in" exchange. Single action was clean, crisp, DA was smooth.
Then, while cocking the hammer very slowly to check timing, I found a weird situation: went slowly and the sear engaged. I kept pulling and it engaged again. Or seemed to. Like there are 2 sear ledges on the hammer, a MM apart, which of course there are not.
I compared it to the original and there are no obvious dimensional differences. I lightly stoned a few surfaces {not the sear) just to see if something would help. Nope, keep getting the 2 "clicks".
I am not worried about something dangerous occurring, there is no "push off" or any malfunction.
Anyone ever experienced this or even heard of it? Thoughts?

 

[Protocall_Design]

It sounds like the stop on the new hammer is a little too short, allowing the hammer to go too far back in SA. The stop for SA is at the rear base of the hammer spur where it contacts the frame. It is probably a situation of "tolerance stacking" where that hammer and that frame were both cut to minimum dimensions, or a bit more, allowing the hammer to go backward too far. The first click is the SA sear, the second click is the trigger going under the hammer.

 

[Anton Chigurh]

Yeah, I spent a lot of time swapping the two hammers back-and-forth and working the action, and couldn't really resolve anything. That must be it.
I guess there's nothing to be done at this point to eliminate the second click. It's one of those things that is irrationally annoying.

 

[Protocall_Design]

A properly fitted trigger stop on the back of the trigger might fix it.