Black Powder Cannon Regulations

Summary

Antique black powder cannons are generally unregulated by federal law, but breech-loading types may have different rules. Consult a local attorney or the Texas Department of Public Safety for confirmation.

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I know there aren't any state regulations, and I've scored the ATF's guidelines and found nothing, which would suggest that it's equally unregulated. I'd just like confirmation.
While it's true that antique firearms, including black powder cannons, typically aren't regulated by federal law, the specifics can vary. Breech-loading firearms may be subject to different rules. It's recommended to consult a local attorney or the Texas Department of Public Safety for confirmation.