I have a gun on order but would like to build a simple ML now. I found a underhammer at Pecatonica River Long Rifle Supply. I was thinking a simple 32cal with a 32" bbl. You could say that the bore and length is square! Just looking for advice here. I would like to build some of the simple parts myself. The 1in 48 is standard for round ball. Is this what I should go with or something slower. I would like to see some pics of your underhammers. (Keep in mind this is a family site!!!) I know if you built some guns you are proud of them