Start by placing the bolt upright in a soft jawed vice, with the
pin perpendicular to vice jaws. Insert an empty case into the
end of the bolt using the extractor as a hinge. Pull the case
to position using inside of little finger. The spring under the
ejector pin now will be compressed. Using free thumb and index
finger of same hand, position punch and tap out the pin. Then
slowly release pressure on the empty case to allow the ejector
pin to rise.
If you can get help, it's a little easier to have them hold the
empty case while you tap out the pin.