Rifle · Proprietary
6.5mm BRX
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..
- Caliber
- 0.264″ · 6.706 mm
- Introduced
- 2003
- Case
- Rimless
- Parent
- 6mm BR Norma
- Primary use
- Hunting
- Status
- Active
- Introduced
- 2003
- Type
- Rifle
- Origin
- United States
- Inventor
- Bruno Berger / Lou Murdica
- Manufacturer
- Bruno Berger / Lou Murdica
- Standard
- Proprietary
- Status
- Active
- Availability
- Uncommon
- Case capacity
- 39.8 gr H₂O
- Twist (typical)
- 1:8
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Max pressure
- 58,740 psi, SAAMI transducer
- Eff. range
- 1000 yd
- Max range
- 3400 yd
- Recoil
- 7.1–8.4 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 6.5mm BRX, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.
Open in Ballistic Compare- Parent case
- 6mm BR Norma
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
SAAMI · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 6.71 | 0.264 | · |
| Neck ⌀ | 7.37 | 0.290 | ~ |
| Shoulder ⌀ | 11.63 | 0.458 | ~ |
| Shoulder angle | 30° | — | · |
| Base ⌀ | 11.91 | 0.469 | · |
| Rim ⌀ | 12.01 | 0.473 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.37 | 0.054 | · |
| Neck length | 5.33 | 0.210 | ≈ |
| Case length | 39.62 | 1.560 | · |
| Overall length | 52.77 | 2.078 | |
Size vs familiar rounds
Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. 6.5mm BRX is highlighted below.
Reloading costestimate cost per round vs factory
Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.
Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.
Lineage
Connected reference
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.
FAQs
- What twist rate does 6.5mm BRX use?
- 6.5mm BRX typically uses a 1:8 twist rate.
- What bullet diameter is 6.5mm BRX?
- 6.5mm BRX uses a 0.264″ (6.706 mm) diameter bullet.
- Is 6.5mm BRX still in production?
- 6.5mm BRX is active; typical availability is uncommon.
- What is 6.5mm BRX used for?
- 6.5mm BRX is primarily used for hunting.
- What is 6.5mm BRX based on?
- 6.5mm BRX is derived from the 6mm BR Norma case.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
