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65-284 Norma Ammo
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The 6.5-284 Norma originated as a wildcat cartridge based on the .284 Winchester cartridge necked down to 6.5 mm.
The 6.5-284 Norma has been used extensively in benchrest competitions and is known as an extremely accurate long-range round. In contrast, most hunting rifles do the same at 100 yards (91.4 m) to 200 yards (182.9 m). A 140 gr (9.1 g) class bullet can be improved safely to 3,000 ft/s (914 m/s).
The parent case .284 Winchester was created around 1963 but did not see extensive commercial use. The 6.5 calibers allowed for the use of long, aerodynamic bullets. In 1999, Norma submitted it to CIP. It has since been standardized as the 6.5mm-284 Norma.
About: 6.5-284 Norma
- Type: Rifle
- Place of origin: Sweden
- Designer: Norma
- Designed: 1999
Specifications
- Parent case: .284 Winchester
- Bullet diameter: .264 in (6.7 mm)
- Neck diameter: .297 in (7.5 mm)
- Shoulder diameter: .475 in (12.1 mm)
- Base diameter: .501 in (12.7 mm)
- Rim diameter: .473 in (12.0 mm)
- Rim thickness: .054 in (1.4 mm)
- Case length: 2.170 in (55.1 mm)
- Overall length: 3.228 in (82.0 mm)
- Case capacity: 68.33 gr H2O (4.428 cm3)
Ballistic performance
| Bullet mass/type | Velocity | Energy |
|---|---|---|
| 125 gr (8 g) Partition | 3,000 ft/s (910 m/s) | 2,497 ft⋅lbf (3,385 J) |
| 142 gr (9 g) Hodgdon | 2,850 ft/s (870 m/s) | 2,557 ft⋅lbf (3,467 J) |
