Although there is limited discussion of the ammunition, the pistols using that ammunition, mainly by Soviet Spetsnaz troops, are virtually unknown to most collectors. An understanding of the guns will help better understand the use of the ammunition, so this should be of interest to members of this forum.
The “ForgottenWeapons.com” site, covers an amazingly broad scope of weapons and ammunition, and you may have fun digging around in their archives to see what else interests you. They recently did a nice review of Bob Mellichamp’s book on 37mm guns and ammunition “A gun for All Nations.”
The silenced ammunition and the guns piece is located at http://www.forgottenweapons.com/russian-silent-ammunition/