Safe barrel wall thickness in the FAQ question

[Drew Hause]

Tom: there is more information here, including the CIP recommendations for Fluid Steel barrels.
https://docs.google.com/a/damascuskn...vwLYc-kGA/edit

We now know that the tensile strength of Pattern Welded barrels is about 1/2 of even vintage fluid steel, reinforcing the importance of using loads that match ballistically those for which the gun was designed. Until about 1920 that would be 3 - 3 1/4 Dram Eq. with 1 1/4 oz. shot with a pressure of at least 10,000 psi
https://docs.google.com/a/damascuskn...EK8OtPYVA/edit

https://docs.google.com/a/damascuskn...hIiY62Hx4/edit

[Drew Hause]

I reviewed the FAQ and it might be better to remove this image



The image shows the standard dimensions of each barrel tested as part of the 1891 Birmingham Proof House Report from "The Field" March 7, 1891 Vol 77:325 and are NOT wall thickness recommendations
Note the chamber has not been bored
http://books.google.com/books?id=inQCAAAAYAAJ&pg=PA9

[Tom]

Thank you Sir
That is a wealth of information.
Tom