OK!!!!
You guys are great!
Too many numbers for me to understand - wood, remember? - I will just print out this thread and give it to my machinist.
Random responses to questions/ comments so far.
Cat Whisperer - If you lived in Council Bluffs, you know where Atlantic is - and - yes, I know where all those places you mentioned are. :>)
Double D - :>) My "table saw" is a 10" cabinet saw by Grizzly - cast iron - probably not good for excessive powder charges, although the pile of dust under it could go "boom", if properly mixed. I understand the welding the trunions part, so does my machinist. I talked to him about boring the blank and then plugging them before turning it in order to align them with the bore. He said something about "not everybody has a large milling machine". I don't know. Wood, remember? :>) He does know how to weld. He builds parts to fix steam locomotives. I am not sure, but he might have even built a steam powered Space Shuttle. My "plan" consists of drawings of plans from a book (Round Shot and Rammers by Harold L. Peterson). I imported them into my CAD program and have been going from there. 1/10 of an inch gets lost pretty quick using this technique.
Rickk - "Sub-Chamber". THAT is what I was trying to think of. I spoke with my machinist about this this morning, but I could not think of the word. I told him my drawing did not show the proper configuration of the chamber, but could not exactly explain what I thought I wanted. MORE INFORMATON, PLEASE.
armorer77 - or "Powder Chamber". I think you and Rickk are talking about the same thing? Believe it or not, I am not really building this thing to shoot - much, but on the other hand who wants a cannon that won't shoot? - and you don't know what the next guy will want to do with it in another 50 years or so. I will make it safe even though I may not shoot it - much. So why would I want to make a cannon to not shoot? Mostly for the look of the cannon. You see, I have a very large gun collection, but nothing over .50 BMG in caliber. I need something BIGGER. Destructive devices load from the breech. Cannons load from the muzzle. :>) Plus - I get a chance to build the carriage. Wood, remember? :>) Anyway, about that "powder chamber". If I understand you and Rickk, I need to reduce the breech end of the bore to 1" by approximately 3"? Of course no "hard" shoulders. Correct?
Thanks, again, everybody for your help with this.
Steve