Armament weights

Since I do not have exact gun inventories for most Amsterdam ships in 1652 and 1653, I can only estimate armament weights. I thought that an interesting exercise would be to compare armament weights for 128ft 40 gun ship, in this case the Vereenigde Provincien, and for a 125ft 40 gun ship, the Maan. They both have four large guns with a 12pdr lower tier. The upper tier on each consisted of 8pdr guns. There were also more guns, perhaps on the quarter deck and poop. The larger Vereenigde Provincien, with my estimates, would have had a 113,400 lbs armament while the smaller Maan would have had a 103,800 lbs armament. Bronze 24pdr guns might have been 4400 lbs. Iron 18pdr guns might have been 3600 lbs. Iron 12pdr guns might have been 3000 lbs. Iron 8pdr guns might have been 2300 lbs. Iron 6pdr guns might have been 1700 lbs. Iron 4pdr guns might have been 1150 lbs.