I'm rebuilding a 2nd Model .44 HE and recently bought a new ejector rod which I think is NOS. I bought it because my original didn't line up in the barrel cut out. As you can see from the photo the threads on the new one were cut longer than the original. Therefore the new rod screws in farther so it is functional shorter still. It is 0.012" shorter (2.901").
So the question is how were ejector rods fitted at the factory?

So the question is how were ejector rods fitted at the factory?