Most of this saboted prjectiles 7,62x39 are the fact of private experiments by local armourers. I actually wonder in what weapon they could be used…
Many “faked experiments” also exist…
In France, approx. 10 years ago, SFEFMA, a small company working on limited special contracts for the Government experimented with plastic sabots in diverse calibres including 7,63x39 and .50 Bwg. I know well the owner and designer, Serge Ranvier, a former military armorer then a SFM technician. He told me it was just a trial of his own, an a private venture, for a possible sniper rifle development (He had himself built a heavy rifle in .50 calibre, exposed in Eurosatory 94, but stopped soon) The SFEFMA operated in the small suburban city of Longjumeau, south of Paris, and specialised in uncommon ammo of several kinds:
-subsonic ammo, for special services, loaded on surplus yugoslavian 7,92x57 brass, later on .308 Win of Seller Bellot origin. This ones weere delivered to French Special Service in limited quantities, packed in 20 rds flat grey boxes with the only inscription “subsonique”.
-propulsive bulletless electric-primed ctgs for EOD systems like Rocket Wrenches, in .50" Bwg and 20x110, several lots were delivered to the Interior Ministry for demining and bomb defusing squads at the end of 90 ies and 2000-2001.
-variation of 40 mm grenades for Police use, following the so-called Flashball, made by Verney-Caron, a non-lethal weapon used by French Police for riot duties. Experiments were based on aluminum cased grenades, to replace the ordinary black plastic ones, which came from the commercial market.
-and trials with saboted bullets. The sabots were commercial US imports, made in pale blue, red and grey plastic. They were only used for feasibility tests.
All this ammunition were handloaded, and built in small quantities, the most important orders being for the EOD ones.
Details have been published several times in the ECRA bulletin.
PS=the SFEFMA closed last year and his owner is to-day working as an independant commercial agent for several Companies, like ARSENAL, in Bulgaria, always on behalf of the French Defense Ministry.