Mo. Rev. Stat. § 293.240
293.240 Blasting cartridge requirements.
293.240. Blasting cartridge requirements. — It shall be unlawful for coal miners in any mine to charge a blasting hole with loose powder, or otherwise than with a properly constructed cartridge; and in dry and dusty mines, it shall be unlawful to load cartridges in the mines except with a powder can constructed for the purpose.
(L. 1959 S.B. 188 § 26)