5,6x52R (22 Savage HP)
In the US this cartridge became essentially obsolete by about 1930; however, European chambering and ammunition production continues. In Europe, it is still quite a popular chambering in drillings and other combination guns used for small game hunting. Charles Newton originally designed the "Imp" in 1912, for chambering in the Savage Model 99 lever-action rifle. He created this number by simply necking the 25-35 WCF down to accept 0.228-inch bullets.
We can suggest two reasons that this American-designed number has survived in Europe. First, roe deer, fox, black grouse and capercailzie are some of the most commonly hunted species in Europe and this chambering is perfectly adequate for use on these species. Second, while rarely used in the US, breach-break combination guns are common in Europe and, with loads at moderate pressure and a rimmed case, this was the only suitable commercial 22-caliber cartridge available for these guns.
For the moment only Hornady offers bullets for this cartridge. Norma does offer loaded ammunition with 70-grain bullets in both soft point and full metal jacket.