I'm considering building a cannon, probably 2-2.5" bore. It would be smoothbore from seamless steel tubing of the correct dimensions (been lurking a long time).
Since it's not an actual replica of an old design, but loads from the muzzle and fires by percussion, would this be considered legal or require an unobtainable permit? I want to stay strictly legal here but I have no interest in making a "true" replica of 1800s design.
I've read the FAQs but I just want to gather opinions for clarification.
Thanks!