6.5×47mm Lapua
| 6.5×47mm Lapua | ||||||||||||||||
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| Type | Rifle | |||||||||||||||
| Place of origin |  Finland |
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| Production history | ||||||||||||||||
| Designer | Nammo Lapua Oy | |||||||||||||||
| Manufacturer | Nammo Lapua Oy | |||||||||||||||
| Produced | 2005–present | |||||||||||||||
| Specifications | ||||||||||||||||
| Bullet diameter | 6.71 mm (0.264 in) | |||||||||||||||
| Neck diameter | 7.41 mm (0.292 in) | |||||||||||||||
| Shoulder diameter | 11.53 mm (0.454 in) | |||||||||||||||
| Base diameter | 11.95 mm (0.470 in) | |||||||||||||||
| Rim diameter | 12.01 mm (0.473 in) | |||||||||||||||
| Rim thickness | 1.37 mm (0.054 in) | |||||||||||||||
| Case length | 47 mm (1.9 in) | |||||||||||||||
| Overall length | 69.5 mm (2.74 in) | |||||||||||||||
| Primer type | Large rifle for Prototypes, small rifle since start of production | |||||||||||||||
| Maximum pressure (SAAMI) | 63090 p.s.i.[1] | |||||||||||||||
| Ballistic performance | ||||||||||||||||
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| Test barrel length: 27.5 Source(s): Lapua (6.5x47 Lapua) |
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6.5×47mm Lapua (or 6.5×47mm) is a rifle cartridge that was developed specifically for 300–1000 meter competition by ammunition maker Nammo Lapua and the Swiss rifle manufacturer Grünig & Elmiger AG in 2005.[2]
Features
The cartridge has many special features including:[3]
- The cartridge chamber dimensions are optimized for target bullets.
- High pressure level (435 MPa / 63,090 psi) and optimized powder capacity enables high velocity and flat trajectory.
- Reduced barrel wear compared to 6mm Norma BR.
- The 6.5×47mm Lapua has a base diameter and overall length similar to the 7.62×51mm, allowing it to accept the same bolt heads and fit into similar actions and magazines.
Performance
The 6.5×47mm was designed from the beginning by Lapua to optimize accuracy, barrel life, and case capacity in a 6.5mm cartridge for tactical and target shooting. The 6.5×47mm produces muzzle velocities similar to 6.5mm/.260 cartridges such as the 6.5mm Creedmoor, or the .260 Remington, because of its ability to reach higher PSI levels;[4] it has a chamber pressure 3000psi higher then the 6.5 Creedmoor,[1] which is also slightly higher than the 260 Remington's maximum rated pressure. Lapua has been able to safely reach greater PSI levels in this cartridge because of advancements they have made in metallurgy. The smaller primer pocket helps, too. Other manufacturers have not been able to produce brass for it yet, because they cannot produce brass to withstand these levels and be repeatedly reloadable.
See also
- List of firearms
- List of rifle cartridges
- 6 mm caliber
- .243 Winchester
- 6.5×54mm Mannlicher–Schönauer - a cartridge that saw military service with the Greek Army from 1903-1949, which fires the same diameter and weight 9.0g bullet as the 6.5×47mm Lapua but achieves a lower muzzle velocity.
Notes
- ↑ 1.0 1.1 Accurate Shooter
- ↑ 6mmbr.com October 2005 News, Features, and Products
- ↑ Lapua New Products
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
