The recording reunion of singer Iggy Pop and guitarist James Williamson on “Ready to Die” is more rough effort, less “Raw Power.” Flying once again under the Iggy and the Stooges flag (Scott Asheton on drums, Mike Watt on bass, and Steve Mackay on sax), Williamson sounds exultant balancing tone and chaos with the sort of glam-punk swagger that inspired countless other careers in the wake of the Stooges’ 1974 collapse. Pop is in a tougher spot, (wisely) unwilling to replicate his “Raw Power” mind-set but not so sure where to train his focus. Full story for BostonGlobe.com subscribers.