Wall thickness thoughts here
https://docs.google.com/document/d/1ZIo0y746UsSRZIgRuuxwAbZjSBHitO_EanvwLYc-kGA/edit

Interestingly, because the angle of the forcing cone exceeds the angle of the taper of the barrel, the forcing cone wall thickness has measured equal or greater than the end of the chamber in almost all the vintage barrels that I have evaluated.