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Lindcott Armory

Rifle · SAAMI

6.5mm Weatherby RPM

Also known as 6.5 Weatherby RPM · 6.5 RPM · 6.5 WBY RPM

Weatherby's rebated precision rifle magnum.

Caliber
0.264″ · 6.706 mm
Introduced
2021
Case
Rebated
Parent
.284 Winchester
Primary use
Hunting, Long Range
Status
Active

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VelocityBeing verified
EnergyBeing verified
Typical grains130 · 140 · 143 gr
Identity
Introduced
2021
Type
Rifle
Origin
United States
Inventor
Weatherby
Manufacturer
Weatherby
Standard
SAAMI
Status
Active
Availability
Common
Build
Case capacity
70 gr H₂O
Twist (typical)
1:8
Primer
Large Rifle Magnum
Case type
Rebated
Pressure & range
Max pressure
65,000 psi
Eff. range
600 yd
Max range
1600 yd
Recoil
6–9 ft·lb

Introduced by Weatherby

Ballistics

Published velocity/energy data isn't available for 6.5mm Weatherby RPM. Parent case: .284 Winchester.

Performance

Best for Withheld until verified
Best for Withheld until verified
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
Measuremmin✓
Bullet ⌀ 6.710.264 ✓
Neck ⌀ 7.490.295 ✓
Shoulder ⌀ 12.140.478 ✓
Shoulder angle 35°— ✓
Base ⌀ 12.700.500 ✓
Rim ⌀ 12.010.473 ✓
Belt ⌀ n/a
Rim thickness 1.370.054 ✓
Neck length 7.160.282 ≈
Case length 65.282.570 ✓
Overall length 84.843.340 ✓

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

Verification

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 →

Reloader 26Reloader 33
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

1 model in the database chamber 6.5mm Weatherby RPM. Browse all →

Weatherby Mark V Accumark 6.5 Wby RPM 24-inch

Lineage

Immediate parent
.284 Winchester
Direct descendants (2)
.338 Weatherby RPM.25 Weatherby RPM
Family TreeOpen 6.5mm Weatherby RPM in the interactive cartridge family tree

Connected reference

Loads14 factory loads for 6.5mm Weatherby RPMReloading2 suitable powders — cross-referenceFirearmsFirearms in 6.5mm Weatherby RPM

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 →