|Place of origin||Finland|
|Parent case||9×19mm Parabellum|
|Case type||Rimless, bottlenecked|
|Bullet diameter||7.6 mm (.2858 in.)|
|Neck diameter||7.9 mm (.311 in)|
|Shoulder diameter||9.5 mm (.3748 in)|
|Rim diameter||10 mm (.3937 in.)|
|Rim thickness||1.27 mm (.50 in)|
|Case length||33.3 mm (1.3122 in.)|
|Overall length||44.4 mm (1.7496 in.)|
|Rifling twist||1 turn in 401.32 mm (15.8 in)|
|Primer type||Small Rifle|
|Maximum pressure||40,611 psi|
|Test barrel length: 24 in.
Source(s): Ammo Encyclopedia, 2nd Edition, Page 395, Michael Brussard
The 7×33mm Sako cartridge was created in Finland in 1942 as a small game cartridge for animals such as the Capercaillie and Black Grouse. It is based on a 9×19mm Parabellum case that has been lengthened and necked down to accept a 7.21mm bullet. The cartridge overall length is 44.30mm with a case length of 33.30mm and a base diameter of 10mm. The bottleneck bends at 26.50 mm (dia 9.50 mm) and straightens at 29.12 mm (dia 7.80mm). The Bertram company of Australia makes brass for it. Sako offers two loadings, a 78gr (5.1g) FMJ and a 78gr soft nose.
Rifles chambered in this caliber include the Sako Models L42 and L46.
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