I posted this as thanks for the help with the tennis ball mortar, but I will post here and see with everyone thinks.
Thanks for the help on the tennis ball mortar. I have a piece of steel about 7" long with a 5" dia. I wanted to make something that I could shoot with my buddies down in Kanas. we go down in a flat field set up our tents and target at 2,4, 6, 8, hundred yards, we shoot black powder rifles and cannons, so I wanted something I could shoot and have fun and impress the boys with. I was going to make a golf ball mortar but seem pretty big for that. Maybe I should just use PVC full of concrete. any other ideas let me know.
Thanks
Jim