I just measured, same as yours. Your bushing isn't pushed all the way in, that’s why the rod is sticking out. Another way that just now worked for me: with the slide in your right hand, line the rod/spring up so the rod is resting in the little 'V' on the barrel lug and the other end is inserted all the way into the bushing. This will have the rod/spring almost parallel to the barrel. With your right thumb pushing on the back of the rod, wiggle/roll it side to side while pulling back on the fwd end of the spring(close as possible to the bushing). Mine drops in with this method as well. Your thumb will be sore, but it'll go. I'm using a round wire spring, are you?