Re: the shell box warning
A.P. Curtis published the second of a two part article entitled “Advantages of Short Shotgun Chambers” in the March 1938
American Rifleman (Courtesy of Larry Brown) which dates the warning.
SAAMI, assembled in serious conference on March 26, 1937, passed the following resolution: “That an appropriate warning label be placed on all boxes containing smokeless powder shells, cautioning the consumer against using them in short chambered guns and also in guns with Damascus barrels and guns not in first-class condition.”
More here
https://docs.google.com/document/d/1...hIiY62Hx4/edit
and "Damascus Mythology & Reality" in the recent Summer issue of
Double Gun Journal. The Fall and Winter issues will contain a 2 part Failure Analysis and Metallurgical Study of a damascus barrel burst, which will refute pattern welded barrel...confusion.