Dutch gun speculation

The two bronze 24pdr guns carried by the Zeeland ship Goes in 1652 and 1653 are interesting, because they only weighted 2384 pounds. To me, that means that they were short and had thin metal, certainly being chambered guns. They seem to have been the sort of mid-Seventeenth Century equivalent to a 24pdr carronade. The problem is that I have no way of knowing just how thin the metal was. My wild speculation puts the length at 5-1/2 Amsterdam feet.