No need for inventory here. I am 59 1/2 years old if I am fortunate enough to live until I’m 80 and continue to shoot at that age I have more than enough. My kids will probably have a yard sale and darn giveaway what is left. And anybody that comes to buy will think they hit the jackpot with what is left after I’m done.
It seems that Feds do not have rules for the storage of gun powder for personal use in small arms. From the ATF website:
Is smokeless powder designed for use in small arms ammunition subject to the explosives storage requirements?
Smokeless powders designed for use in small arms ammunition are exempt from regulation under 18 U.S.C. Chapter 40 and the regulations in 27 CFR Part 555. Packaging that readily identifies the smokeless powder as being designed for use in small arms ammunition may help in determining whether it is entitled to the exemption. Smokeless powder designed for use other than in small arms ammunition, and explosive products such as squibs, fireworks, theatrical special effects, or other articles that may contain smokeless powders, are regulated and must be stored pursuant to the regulations at 27 CFR 555, Subpart K – Storage.
Is smokeless powder designed for use in small arms ammunition subject to the explosives storage requirements? | Bureau of Alcohol, Tobacco, Firearms and Explosives
Smokeless powders designed for use in small arms ammunition are exempt from regulation under 18 U.S.C. Chapter 40 and the regulations in 27 CFR Part 555. Packaging that readily identifies the smokeless powder as being designed for use in small arms ammunition may help in determining whether it...www.atf.gov
Meaning, such storage will be regulated by the state/county/local municipality, if at all, and so the total amount allowed will vary from one jurisdiction to the next.