Production of a mono-, di- or tribasic gun propellant powder comprises subjecting particles of a conventional propellant powder, comprising nitrocellulose, nitrate esters, alkyl nitratoethyl nitramines, nitroguanidine, hexogen, octogen, 3-nitro-1,2,4-triazol-5-one and/or hexanitrohexaazaisowurtzitan, to surface treatment with inert or energetic polymers and/or energetic monomeric plasticizers.
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