My first trade gun was a chiefs grade 20 ga. with a thirty inch barrel, I built from scratch. I never have found a trader that shot better. I currently have a Curly era standard trader, with a 42" barrel, and although it is well balanced, its not a handy length, and I like the drop in the chiefs grade better. If I was building another short trader, and my focused was more on round ball shooting, than shot shooting, I would build a chiefs grade, with a 30" barrel, in .58 cal., they just shoot flatter.
The canoe gun is great, if you just want something all tacked up, to make your camp look woodsy, but unless you do a lot of horseback outings, its impractical. JMHO.
Hungry Horse