There are many talks about .22 cal cartridge based on Tokarev case - I have made short research in this regard and introducing you the one which was at the beginning of the story…(at least on the European side)
.22 Tokarev cartridge was developed in early 90’s (1993-1994) by Rene Hanulik – Czech gunsmith for his modified Tokarev TT33 pistol. Only one pistol was made (with 2 barrels) – one in standard length 4.6” and extended one for higher muzzle velocities (5.75”); standard frame has been enlarged to hold double stuck magazine for 15 and 20 rounds. This gun was probably captured by police when he died and shall be kept in their deposit.
.22 Tokarev cartridge has been used as a predecessor of .224 VOB. Dimensions are almost the same except the case length (25.3mm) and OAL length (34.5mm). Cartridge cases are Czech military origin with Berdan primer, chemically cleaned. This cleaning technology used Sellier& Bellot in 80’s and 90’s for factory reloads of obsolete calibers. Loading info as well as performance unfortunately unknown…
Measurement can be seen at municion.org (.22 Tokarev)
These cartridges came from the same person who provided me with SLS/AMB info. He was really good friend of Rene Hanulik, creator of .22 Tokarev.
Even Petr Voboril (.224 VOB “designer”) confirmed that the cartridge design was not done by them but somebody did it for them from Eastern Bohemia. Hanulik lived in Pardubice…located in Eastern Bohemia.
Cartridges on the picture above:
.22 Tokarev (Hanulik case) is 25.3mm
.224 VOB is 23.2mm
.22 TCM is 26mm (based on .223 case)
.22 Reed Exp. is 24.9mm
.224 BOZ is 23.1mm (based on 10mm Auto case)
5.6 Picra is 24.9mm
I don’t have Picek’s case to compare with .22 Reed Express but it looks very similar - most of the Picra cartridges are “certified” US wildcats.
.224 VOB was intended for 26 rounds pistol constructed by Martin Tuma (CH)…I don’t know whether it was capable to shoot in bursts…? Probably yes.
.22 Tokarev (made by Hanulik) - except TT 33 pistol there could be barrel made for SA 24 as well
(there are people who witnessed Hanulik’s test shooting). There were many projects in early 90’s without the proper records.