Actually this is a them, as I'm building a pair. One to keep and one as a gift for a friend.
I'd never built a mortar before when I started my first golfball project, so I just looked at my piece of stock and said "It will be this big." Turns out it was seriously overbuilt, with a chamber that could almost put a GB into low earth orbit. But it's been a lot of fun.
Over the years and other mortar projects of varying calibers, I've come back around to the golfball. This time in a more compact package.
I've had this on the boards for awhile now (a long while), and I've had the steel blanks sawed for months. I didn't want to start a thread until I had actually done
A few days ago I went to the shop and turned and faced one end of each. Then went back this morning and bored and chambered the first tube. It will probably be next weekend before I can get back up there to bore the other one.
In the meantime I will start making handle parts and assembling my soldering fixture.
I bought 3/16" brass flat for the handles, the brass rod I already had.
I will be constructing a bed for mine, the other will be sent with all the instructions and measurements and he can take it from there.