Rifle · SAAMI
6.5mm Weatherby RPM
Weatherby's rebated precision rifle magnum.
- Caliber
- 0.264″ · 6.706 mm
- Introduced
- 2019
- Case
- Rebated
- Parent
- .284 Winchester
- Primary use
- Hunting, Long Range
- Status
- Active
- Introduced
- 2019
- Type
- Rifle
- Origin
- United States
- Inventor
- Weatherby
- Manufacturer
- Weatherby
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Case capacity
- 82.5 gr H₂O
- Twist (typical)
- 1:8
- Primer
- Large Rifle Magnum
- Case type
- Rebated
- Max pressure
- 65,000 psi, SAAMI transducer
- Eff. range
- 600 yd
- Max range
- 6000 yd
- Recoil
- 22.8–25.6 ft·lb
Introduced by Weatherby
Ballistics
Published velocity/energy data isn't available for 6.5mm Weatherby RPM. Parent case: .284 Winchester.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
SAAMI · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 6.71 | 0.264 | ✓ |
| Neck ⌀ | 7.49 | 0.295 | ✓ |
| Shoulder ⌀ | 12.14 | 0.478 | ✓ |
| Shoulder angle | 35° | — | ✓ |
| Base ⌀ | 12.70 | 0.500 | ✓ |
| Rim ⌀ | 12.01 | 0.473 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.37 | 0.054 | ✓ |
| Neck length | 7.16 | 0.282 | ≈ |
| Case length | 65.28 | 2.570 | ✓ |
| Overall length | 84.84 | 3.340 | ✓ |
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 Weatherby RPM is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
2 reloading powders listed for 6.5mm Weatherby RPM, fastest to slowest. Cross-reference in the finder →
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.
Firearms chambered in 6.5mm Weatherby RPM
Lineage
Connected reference
History
Introduced by Weatherby in 2021 as the cartridge for their new Weatherby 307 rifle. Uses a rebated rim for standard bolt face. Positioned between 6.5 Creedmoor and 6.5 PRC in the market.
FAQs
- What twist rate does 6.5mm Weatherby RPM use?
- 6.5mm Weatherby RPM typically uses a 1:8 twist rate.
- What bullet diameter is 6.5mm Weatherby RPM?
- 6.5mm Weatherby RPM uses a 0.264″ (6.706 mm) diameter bullet.
- Is 6.5mm Weatherby RPM still in production?
- 6.5mm Weatherby RPM is active; typical availability is common.
- What is 6.5mm Weatherby RPM used for?
- 6.5mm Weatherby RPM is primarily used for hunting, long range.
- What is 6.5mm Weatherby RPM based on?
- 6.5mm Weatherby RPM is derived from the .284 Winchester case.
- What are the best powders for 6.5mm Weatherby RPM?
- Reloading powders commonly listed for 6.5mm Weatherby RPM include Reloader 26, Reloader 33.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 14 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
