I have never posted a video before, hope it works. This is a gunpowder pumpkin cannon I made a couple years ago, it weighs about 1000 lbs., I pull it with my truck as I used a tounge from one of my wagons. We have pumpkin fest at our house in the fall with friends and neighbors. I used a 6 foot reclaimed die cast nitrogen tank for the barrel as it is 1" thick walled and has about a 60lb. breech plug with very fine threads as you can tell...lol. The bore is a little over 7". I use about a 1/2 lb. of pyrodex and cannon fuse and it will usually send them about a half mile. If your in the neighborhood next early Oct., stop by.