J & K frame Rossi with same problem

[graycrait]

OK, call me stupid, but that is besides the point. I picked up a pair of Rossi revolvers, a J-frame for 85.00 and a K-frame with broken hammer for 10.00. I put a DAO only hammer from Numrich in the K-frame sized DA Rossi and every time I put it back together with the hammer block in the trigger does not freely reset all the way every time. It will run in DA sometimes 6-10 times then the trigger has to be nudged forward just the least little bit so that I guess the sear clears the trigger. At least that is what I am thinking. With either the hammer block out or the side plate off the thing runs like a champ.

Oddly enough, the J-frame Rossi has the same problem. When I was working on the J-frame I couldn't figure it out so got a couple of extra hammer blocks from Numrich, as well as a rebound block - that now seems like a waste of money. Sideplate off or hammer block out the thing runs, put the hammer block in, tighten the sideplate and the J-frame's trigger won't reset, just like the K-frame.

I've been doing Miculek-like "Trigger Jobs" on S&W for years and have never run into this issue. I have a feeling there is something fundamental I am not doing right in reassembly but putting on a sideplate with a hammer block greased into its slot ain't rocket science, but it has me bamboozled. I've got the Kuhnhausen shop manual too, to no avail.

Besides the cutoff saw for these two Rossies any suggestions?

Craig