There are some people having success at distance using smokeless in these rifles. In that case I'd seriously think about the .45-70 as generally you will be looking at loads that don't come close to filling the case. If I wanted to learn how to use smokeless accurately in these rifles I'd get in touch with a few of the guys that have placed in the top 10 in the annual Quigley shoot in Montana. For real accuracy at distance you'll likely still want to cast your own bullets. Mostly so that you can find the best design to fit your rifle's chamber.
You are lucky to have Connaught within driving distance. There are some super talented guys that shoot black powder there. Many of them travel from pretty far to do it. I'd like to shoot there some day, but it's closer for me to shoot in America. If you ever shoot black powder at Connaught and attend the Canadioan Championships, go look for Dave Gullo. He's arguably the most talented BP long range shooter in the world today and he's super nice to talk with.
Chris.
You are lucky to have Connaught within driving distance. There are some super talented guys that shoot black powder there. Many of them travel from pretty far to do it. I'd like to shoot there some day, but it's closer for me to shoot in America. If you ever shoot black powder at Connaught and attend the Canadioan Championships, go look for Dave Gullo. He's arguably the most talented BP long range shooter in the world today and he's super nice to talk with.
Chris.