late WW2 rebuild of 1940 receiver

[RCS]

Mark, the swaging is always done before barrel installation. If you screw the barrel into a receiver by hand it should stop about 3/16 inch (approx)
before index. You then tighten the barrel with the wrench. Sometimes you screw the barrel into the receiver by hand and the barrel will go past the index
and then you need swaging to expand the area above the threads for the correct index.

Others (myself included) have used a hammer to gently tap all the way around the rear of the barrel to provide swaging and works most of the time - but
swaging in a lathe with rollers is still the best.

The big debate years ago was did Springfield use swaging on new production receivers and barrels during WW2