Bought a used Range Officer. The previous owner had done some home gunsmithing on it, mainly the mainspring housing. I bought the parts and rebuilt it using a 23lb hammer spring. Does anyone know what the factory hammer spring weight in a Springer is supposed to be? I'm wondering if the 23lb spring might be more than the firing pin was designed to work with and may accelerate wear or damage the FP. Maybe it's just me but it seems like a lot of the newer 1911's come with lighter hammer springs. I measured the firing pin and I'm coming up with .069; I thought a Springer FP was supposed to measure .075. I tried measuring the FP hole in the breechface but my calipers are too big to get in there.