Started a .50 caliber smooth bore pistol about a month ago made out of stuff laying around the shop. Barrel was a piece of 1 inch stainless bar stock which I shaped and bored out on my old South Bend heavy ten. It's a blind bore with no breach plug and was proofed with 75 grains of 3F and double patched round balls. Wired the barrel to a piece of 2x6, buried it in the back yard and covered it with some diamond plate and fire wood for the proofing. Bought the trigger guard but made the trigger assembly. The lock was from a cheap 60's pistol kit imported from Japan that had a soft frizzen and bad geometry. I made a new hammer since the build was a cap lock. The lock had a lot of problems including a busted main spring which I ended up replacing with one for a Brown Bess after tweaking it. Stock is from some 25 year old slab cut Pennsylvania walnut which I've been dragging around for what feels like forever.
Just for something different I carved a stylized skull in the grip. The butt cap started out as a flat piece of brass and must of taken 2 hours to hammer into shape. Gotta wonder how they made guns back two hundred plus years ago.
I've already shot it using 25 grains 3F and a PRB. Hit the same hole in the target twice at 5 yards free hand so I'm happy with it so far. Still need to finish sanding and finishing along with polishing the brass. Guess it's not very period correct or pretty but it's been a fun build so far.