Stumbled across this from Nathan Foster
The following video details how to anneal an SST or Interbond projectile as described amongst the cartridge texts
of the knowledge base. Annealing can produce two benefits. In the first instance, it helps the frontal area of both the SST and IB to swage back after expansion, the frontal area folds back against the bullet shank and the reduced frontal area allows for much deeper penetration- but without sacrificing wound channel diameters.