The help and traslate

What is the type of gun powder “POUDRE PYROXYLÉE” engraved on older French shot gun barrel?
Is this semi-smokeless powder, or?

I have a french encyclopedia explaining ‘Poudre Pyroxylée’ as

Aussi appelée “poudre sans fumée”, elle fut inventée en 1884 par l’ingénieur général des poudres et chimiste français Paul Vieille au Laboratoire Central des Poudres et Salpêtres à Paris. Il s’agit d’un mélange de fulmicoton (68%) et de collodion (30%), mélangés à de l’éthanol et de l’éther puis malaxés pour former la substance.

translates as:

Also called “smokeless powder”, it was invented in 1884 by the general engineer of powders and French chemist Paul Vieille at the Laboratoire Central des Poudres et Salpêtres in Paris. It is a mixture of fulmicoton (68%) and collodion (30%), mixed with ethanol and ether and then kneaded to form the substance.

It means, in the opinion of the maker, the barrel was strong enough for shooting smokeless powder cartridges. Smokeless powder is made from a mix of different types of nitrocellulose (different contents of nitrogen) and Pyroxilin is one of the many names used in this context.

Thanks for your help!