I’ve been custom loading ammunition (and shooting them) for over 20 years in pretty much every known type of man portable small arm.

From modern military machine guns to muzzle loading black powder cannon.

That's awesome, man. Thanks for answering. Black powder cannon I guess that's like something they had on wooden navy ships? Wow

This one was a small one, 20 lbs or so. A convenient ‘loophole’ in US firearms law.

It makes quite a noise!