Includes cartridge charging or loading – all operations involving the handling of explosives or mixing of fulminate.  

Non-ratable element Statistical Code 0771 shall be assigned in conjunction with Code 4771 to reflect the non-ratable catastrophe loading.  Premium generated by the non-ratable element Statistical Code 0771 is not subject to experience or retrospective rating.

Code 4771 applies to employers engaged in manufacturing explosives or ammunition including cartridge charging or loading.  This classification also includes bag loading, black powder manufacturing, cap, primer, fuse, booster or detonator assembly, cartridge manufacturing or assembly, fireworks manufacturing, high explosives manufacturing, loading of projectiles, bombs, mines or grenades, shell case loading and smokeless powder manufacturing – single base assembly and the manufacturing of nitrate and sulphuric acid provided that the production of the particular chemical or acid goes into the making of the smokeless powder. 

By no means is it to be implied that all operations described are permissible in New York State.  Refer to New York State Law for regulations.