Nice work with an under appreciated cartridge. The old BN cartridges have been mostly shunned by contemporary shooters. They can be a little fussier than straight cases, but they are capable of fine accuracy. While I haven't had it out in a while, I have a Shiloh .40-2 1/4BN that has shot just a hair over 1" at 100 yards with FG and a PP bullet. I look forward to hearing your progress.