Legendary long-range competition wildcat. Dominated 1000-yard competition before 6.5 Creedmoor. More powder capacity than Creedmoor but requires long action. Still competitive.
Type: Rifle
Introduced: 2003, United States/Sweden
Parent case: .284 Winchester
Standardization: CIP
Bullet diameter: 0.264" (6.71 mm)
Case length: 2.17" (55.12 mm)
Overall length: 2.8" (71.12 mm)
Max pressure: 60,000 PSI
Rim type: Rebated
Primer: Large Rifle
Typical twist rate: 1:8
Muzzle velocity: 2900–3200 fps
Muzzle energy: 2600–3200 ft-lbs
Effective range: 1200 yd
Common bullet weights: 120, 130, 140, 143, 147 gr
Primary use: Competition, Target, Hunting
Production status: Active
Also known as: 6.5-284 · 6.5x284
History: Developed in 1960s by necking .284 Winchester to 6.5mm. Quickly became dominant in long-range competition. Swedish ammunition maker Norma began producing factory ammunition in 1990s. Never achieved full SAAMI standardization but widely used. Dominated 1000-yard competition until 6.5 Creedmoor's introduction. Offers more velocity than Creedmoor but requires long action. Still very popular in…
Notable firearms: Custom long-range rifles, Competition precision rifles, High-end hunting rifles
Similar cartridges: 6.5 Creedmoor, 6.5 PRC, .260 Remington