I'm just finishing a project gun and about one out of 10 cycles the hammer will follow slide forward. I don't cycle it with an empty chamber, always with dummies to make it as real as possible. I installed an EGW fire control kit and fit the sear using the Eb Brown sear jig. I cut the relief angle using a .020" feeler. I think I may have taken too much off of the relief angle, bringing the contact point out on the hammer hooks making it easier for the hammer to fall off the sear. The hammer hooks are right around .021" so I don't think the hooks are too small. I'm just trying to get some more expierienced advice before I order a new sear. I have also increased the tension on the sear spring so I'm really thinking it's the sear. More advice the better.
Oscar
Oscar