I posted a query to AAA munitions last night for additional info on this tube.
Here are the questions:
Can you give me some additional information about the bowling ball coehorn.
Who made it?
What is it made from? Steel, Casting, lined casting?
Does it have a powder chamber? what size?
What is the diameter of the trunnion?
What is the weight of the tube?
Here are the answers just as they sent them:
all steel,
chamber is the outside configuration of a shot glass
trunions are 3" and fit into the cheeks.
load is 3 oz,
weight around #700
Jump on guys!!!