So from the best I can tell if you use a lift charge of BP you need an explosive lic. and magazine locker . If you use it in a front stuffer you don't ?

https://www.atf.gov/sites/default/files/assets/Explosives/Industry/open-letter-black-powder.pdf

Wonder how this effects people using black powder for cartridges in modern fire arms or people reloading for 37 / 40 mm launchers

How will I shoot my avils?

More hoop's to jump threw, this way if they ever need to they have grounds to arrest you!

Not a new reg, they are just restating for clarity what has always been the regulation.

I think it is pretty clear:

(3) the black powder is intended to be used in antique firearms or antique devices solely for sporting, recreational or cultural purposes.

Users of Black Powder: No explosives permit is required if a person only intends to purchase and use commercially manufactured black powder in quantities not to exceed 50 pounds for the above stated purposes in antique firearms or antique devices.  However, any individual or company purchasing any amount of black powder for any other purpose, including for use in fireworks or pyrotechnics, must obtain a Federal explosives license or permit.


Emphasis added by me.

 I guess shooting the holy black in cartridges out a Pietta copy of an 1873 Colt Cattleman is now dangerous to the public.


 These guys and their loose and ambiguous interpretations...


~Will