Andrew very kindly gave a great deal of space to 2023 publication on aes grave:
“The Strangeness of Heavy Bronze” (full text)
I will only point out that the iron in ramo secco makes the bars lighter not heavier. Iron is a lighter element than Copper or Lead or Tin. The Iron must remain a mystery. It render an admixture (not a true alloy) that is at once difficult to make and also completely impractical for any utilitarian purpose. I discuss this v briefly in my 2021 piece (no. 6)
“#NotAllElephants (Are Pyrrhic): Finding a Plausible Context for RRC 9/1” Ancient Numismatics 2, p. 9-42. DOI: 10.19272/202114401001. Unformated text and images with indication of page number in print text.
I may have to say more as I grapple more with his thoughts.
Liv Mariah Yarrow 