I was diggin through my box of junk the other day to find a 3 screw trigger for a 300 WM I was putting together and found one of those fat looking triggers too, it looked like someone had added a overtravel screw to it, I was just about to see if it would fit when I found the normal thinner 3 screw, I guess I should have tried it out, I was also wondering if it came from a target action or something.

Mike