I have a System 1 with .32, 50, 54, 58 and 12 gauge barrels. I only wish I had a .45. Very nice rifle/shotgun, killed more turkeys than deer, but that is my fault. I prefer flintlocks for deer.
This whole "scope on the receiver" issue is not an issue. Don't we all sight in before a season? If I have hunted squirrels with the .32, and am going to go for deer with the .50. wouldn't I want to sight (and practice) with the different load? If I went for Elk with the .54, wouldn't I want to sight in (and practice) with the .54? Come on, guys!
I have two barrels for my Lyman Great Plains lefty cap lock. One with a GP barrel for round balls over black, one GPH barrel for sabots and 777. Both have scopes mounted on the interchangeable barrels. Don't I still sight in (and practice) with both ???
My Remington 700 .308 has a scope mounted on the receiver, but no interchangeable barrel feature. When I shoot woodchucks in the summer with 125 grain bullets, don't I sight in with the 165s before deer season? If I went to Maine for a bear hunt, wouldn't I re-sight is with my 180 Partitions (and practice) before my hunt?
Non issue.
ADK Bigfoot