Blown-out, necked-up version of the 6mm BR for long-range benchrest; fills the gap between 6mm BR and 6.5mm Creedmoor for 600–1000 yard competition.
Type: Rifle
Introduced: 2003, United States
Parent case: 6mm BR (necked up, blown out)
Standardization: Proprietary
Bullet diameter: 0.264" (6.71 mm)
Rim type: Rimless
Primer: Boxer Small Rifle
Production status: Active
Also known as: 6.5 BRX · 6.5 BR Xtreme
History: The 6.5mm BRX combines necking the 6mm BR up to 6.5mm with blowing out the case for improved capacity. It offers the inherent accuracy of BR-derived brass with 6.5mm bullet selection, sitting between the 6mm BR and 6.5 Creedmoor in performance. Used in long-range benchrest and F-Class competition.