.22 Savage Hi-Power
Wikipedia
https://en.wikipedia.org/wiki/.22_Savage_Hi-Power
[Excerpt:]
“It is based upon the .25-35 Winchester cartridge necked down to accept a .227in/.228in diameter bullet...In Europe, the .22 Savage Hi-Power is called the ‘5.6×52mmR’, and it’s still made by RWS,[4] Norma, Sellier & Bellot, and Wolf Ammunition, and exported to the U.S. market.”
70 gr (5 g) 3,100 ft/s (940 m/s) 1,493 ft·lbf (2,024 J)
and the 25/35 was a necked down .30-30