Thanks. I just got through to the Rifle Shoppe and ordered a set of lock castings (they were in stock). 20 gauge and 46" is my minimum, if I had my druthers I'd get 12 gauge and 50". But I just got some extra spare change and am ready to buy, so will call Barbie, Ed Rayl, John Getz, and a couple others to see what's available in stock and will decide what fits best. I found a stock blank dealer with a long round smooth barrel, and I found a guy with a 50" 20 gauge barrel inlet into a beautiful piece of curly maple. If you're like me, you know the drill- agonize a long time over how much to spend and exactly what profile, gauge (or caliber), etc.
The gun will be a Dutch fowler, not strictly a Hudson Valley fowler, but from near that area (Mohawk valley), from around 1720. The trick is that it will be a "spec" gun- I'll build it the way I want then hope to sell it. That's always the tricky part. Larger gauges are more historically accurate for these early fowlers and for militia guns, compared to trade guns and fusils. But customers seem to prefer 20 gauge or smaller in fowlers and only go bigger for militia guns for reenactment. This summer I'm heading back east to the Mohawk Valley where I grew up, will visit all the local museums and check their guns, make a bunch of drawings and measurements, rubbings, tracings etc. Generally I end up making 2 guns of a genre. Once in the mode, having a feel for it, the momentum is just there.