There is also the problem of getting a sturdy vent into the barrel in a secure fashion.
This is an all wooden gun barrel but I would never consider trying to make it shoot. There are just too many safety variables that would have to be overcome.
The barrel is 36" long
Just the carriage.
There is a lot involved in a properly made carriage.
The side cheeks are tapered so the trunnion pockets and all through bolt holes have to be drilled at an angle.
The trunnion bolts have to run vertically through the side cheeks and the axle.
The rear axle is also held on...
The best thing you can do is invest a few bucks in Antique Ordnance Publishers drawing for a #1 carriage.
You will then have full detail on every item on that carriage.
There is a lot involved in a carriage like that. You get out of it only what you are willing to invest in it.
Here is a garrison carriage I made for a Brooks USA golf ball bore 24 pounder. It turned out real nice!
That barrel is 45 lbs. of brass!
I used a drawing from "Round Shot and Rammers" for the carriage.