Dutch guns in 1653

One of the amazing features of 17th Century Dutch guns is that the shot weight is not a very good indicator of the weight of a particular piece. In fact, because of how guns were manufactured, there were usually not two pieces of the same weight. The material also affected the weight. I have weights for both bronze and iron guns, although most guns seem to be iron, often purchased from Sweden. Some examples:

3pdr iron     715 lbs
4pdr iron    1035 lbs
5pdr bronze  1400 lbs
6pdr iron     970 lbs
6pdr iron     370 lbs