7×33mm Sako: Difference between revisions
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The '''7×33mm Sako''' [[Cartridge (firearms)|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 {{Convert|7.21|mm|abbr=on}} bullet. The cartridge overall length is {{Convert|44.30|mm|abbr=on}}, with a case length of {{Convert|33.30|mm|abbr=on}} and a base diameter of {{Convert|10|mm|abbr=on}}. The bottleneck bends at {{Convert|26.50|mm|abbr=on}} (diameter {{Convert|9.50|mm|abbr=on}}) and straightens at {{Convert|29.12|mm|abbr=on}} (diameter {{Convert|7.80|mm|abbr=on}}). The Bertram company of Australia makes brass for it. Sako offers two loadings: a {{Convert|78|gr|abbr=on}} FMJ, and a 78 gr soft nose.<ref>{{Cite web |url=http://www.sakosuomi.fi/pdf/sako_patruunataulukko.pdf |title=Sako patruunataulukko |trans-title=Sako ammunition table |access-date=2015-07-16 |archive-url=https://web.archive.org/web/20150717092152/http://www.sakosuomi.fi/pdf/sako_patruunataulukko.pdf |archive-date=2015-07-17 |url-status=dead }}</ref> |
The '''7×33mm Sako''' [[Cartridge (firearms)|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 {{Convert|7.21|mm|abbr=on}} bullet.<ref>https://cartridgecollector.net/cartridge/7-x-33-sako/</ref> The cartridge overall length is {{Convert|44.30|mm|abbr=on}}, with a case length of {{Convert|33.30|mm|abbr=on}} and a base diameter of {{Convert|10|mm|abbr=on}}. The bottleneck bends at {{Convert|26.50|mm|abbr=on}} (diameter {{Convert|9.50|mm|abbr=on}}) and straightens at {{Convert|29.12|mm|abbr=on}} (diameter {{Convert|7.80|mm|abbr=on}}). The Bertram company of Australia makes brass for it. Sako offers two loadings: a {{Convert|78|gr|abbr=on}} FMJ, and a 78 gr soft nose.<ref>{{Cite web |url=http://www.sakosuomi.fi/pdf/sako_patruunataulukko.pdf |title=Sako patruunataulukko |trans-title=Sako ammunition table |access-date=2015-07-16 |archive-url=https://web.archive.org/web/20150717092152/http://www.sakosuomi.fi/pdf/sako_patruunataulukko.pdf |archive-date=2015-07-17 |url-status=dead }}</ref> |
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Rifles chambered in this caliber include the Sako Models L42 and L46. |
Rifles chambered in this caliber include the Sako Models L42 and L46. |
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Latest revision as of 22:17, 8 August 2024
| 7×33mm Sako | ||||||||
|---|---|---|---|---|---|---|---|---|
| Type | Rifle | |||||||
| Place of origin | Finland | |||||||
| Production history | ||||||||
| Designer | Sako | |||||||
| Designed | 1942 | |||||||
| Manufacturer | Sako | |||||||
| Produced | 1942–1960s | |||||||
| Specifications | ||||||||
| Parent case | 9×19mm Parabellum | |||||||
| Case type | Rimless, bottlenecked | |||||||
| Bullet diameter | 7.26 mm (0.286 in) | |||||||
| Neck diameter | 7.9 mm (0.31 in) | |||||||
| Shoulder diameter | 9.5 mm (0.37 in) | |||||||
| Rim diameter | 10 mm (0.39 in) | |||||||
| Rim thickness | 1.27 mm (0.050 in) | |||||||
| Case length | 33.3 mm (1.31 in) | |||||||
| Overall length | 44.4 mm (1.75 in) | |||||||
| Rifling twist | 1 turn in 401.32 mm (15.800 in) | |||||||
| Primer type | Small rifle | |||||||
| Maximum pressure | 40,611 psi (280,000 kPa) | |||||||
| Ballistic performance | ||||||||
| ||||||||
| Test barrel length: 24 in (610 mm) 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 7.21 mm (0.284 in) bullet.[1] The cartridge overall length is 44.30 mm (1.744 in), with a case length of 33.30 mm (1.311 in) and a base diameter of 10 mm (0.39 in). The bottleneck bends at 26.50 mm (1.043 in) (diameter 9.50 mm (0.374 in)) and straightens at 29.12 mm (1.146 in) (diameter 7.80 mm (0.307 in)). The Bertram company of Australia makes brass for it. Sako offers two loadings: a 78 gr (5.1 g) FMJ, and a 78 gr soft nose.[2]
Rifles chambered in this caliber include the Sako Models L42 and L46.
See also
[edit]References
[edit]- https://web.archive.org/web/20080302013841/http://www.thegunzone.com/carbine-wildcat.html
- https://web.archive.org/web/20110714091350/http://www.midwayuk.com/apps/eproductpage.exe/showproduct?SaleItemID=506583
- https://www.ssaa.org.au/stories/historical-collecting-cartridges.html
Notes
[edit]- ^ https://cartridgecollector.net/cartridge/7-x-33-sako/
- ^ "Sako patruunataulukko" [Sako ammunition table] (PDF). Archived from the original (PDF) on 17 July 2015. Retrieved 16 July 2015.
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