My estimate of the 1628 bronze 24pdr drake gun weight

My first attempt at an estimate where I have an idea of dimensions for a gun is a 24pdr bronze drake from 1628. I have a lower resolution scan of Nico Brinck's drawing, so I had some trouble reading the numbers. The gun is about 2273mm long (8ft long in Amsterdam feet). My weight estimate, based on metal volume is 2739 pounds (Amsterdam pounds of 494.09 grams). I do all the important calculations in metric measurements.