All those cartridges are “Factory Wildcats” mostly developed in Finland, for various ex Military action rifles ( Mostly Mosin Nagants and Swedish
The 6,3x53 R is based on the Russian and Finnish 7,62x54R case ( in Finland referred to as “53R”), and used in Mosins and the occasional Ross Mark III rifle ( for Running Deer Competition…World and Olympic championships)…effectively a “.25 Russian”. Power equivalent to Aussie .303/25.
The 7x54 is a derivation from the 6,5x55 Swede Mauser, ( in Scandinavia) and was also used in France ( where it was derived from the 7,5x54 MAS case, for “civilianizing” sporting rifles and MAS36 Hunting rifles made by Manufrance – 7,5MAS in France is a Cat.1 calibre ( Military only).
The 6,5x52R looks like a .264 version of the 22 Savage HP ( which in Europe is 5,6x52R.
And the 9,3x53R is simply a .360 version of the Russian /Finnish Miltary cartridge ( For heavy Moose and Bear, as in Polar)…again, on Mosin actioned sporting rifles.
The Russians also made the 9x54R Medved ( “Bear”) cartridge, for use in both Bolt guns and a semi-auto sporter rifle, of which some were available in Australia in the late 1960s, early 70s ( Baikal importers, in SSAA Journal of the time).
The LAPUA H/S cases are new Made, ( for the calibre concerned) whilst the 6,3x53R is an old VPT Military brass case, recycled to make the smaller calibre ( either Pulled-down Military ammo, or once fired brass of same.)
In the 1950s ( era of the packets) SAKO, Lapua and VPT were effectively the one “combine” as far as Ammunition was concerned ( the conditions of the 1944 Armistice with the Soviet Union caused a “Re-organisation” of ammo plants in Finland, all of which were wholly or partially Gov’t owned and operated. ( for both Military and civil production).
Nice find, both Packets and original cartridges to go with them.