Takom Krupp 21cm Morser UPDATE 1/23/17 More Parts!
Many thanks, my friends! The rifling wasn't too bad, I annealed it first, to make the metal more malleable. I found a piece of aluminum tube that was close to the diameter I wanted and formed the sleeve over it by slowly pressing it around the tube. If I hadn't found the review that told me the sleeve is a couple ribs too wide, it would have been more difficult. I used a new knife blade and straight edge to remove the extra width. I reformed the sleeve after trimming, I wanted to make sure mine was too wide before I cut it. The sleeve was glued in with 3M Quick Dry Adhesive, that gave me a little more working time and still holds PE strong when dry. It's clear too, so a good choice. I couldn't get the sleeve to be square on both ends, it is cut on a bias. To correct this, I let the small amount of excess stick out of the barrel and plan to file it off before primer.
Thanks for coming by, more to come.
:drinks