Examples from the Web for smokeless
Many recent improvements have been made in the production of gunpowder, the most important resulting in the smokeless powder.Great Inventions and Discoveries|Willis Duff Piercy
Smokeless and even noiseless powders seem to have been sought for during the whole gunpowder period.
The guy who refused to dig up, went sparkless and smokeless to bed.The Road|Jack London
The smokeless steam-coal of South Wales guarded the heritage of Trafalgar.
In addition they are not smokeless, and leave a considerable residue which in a gun would produce serious fouling.