Lindcott Armory Rifle · SAAMI
.338 Weatherby RPM
Efficient, rebated-rim .338 Weatherby cartridge for lightweight six-lug Mark V rifles..
- Introduced
- 2022
- Type
- Rifle
- Origin
- United States
- Inventor
- Weatherby
- Manufacturer
- Weatherby
- Standard
- SAAMI
- Status
- Active
- Availability
- Limited
- Bullet ⌀
- 0.338″
- Case length
- 2.55″
- Overall length
- 3.38″
- Base ⌀
- 0.5″
- Rim ⌀
- 0.473″
- Primer
- Large Rifle Magnum
- Case type
- Rebated
- Max pressure
- 65,000 psi
Ballistics
- Velocity
- 2,800–3,100 fps
- Energy
- —
- Parent case
- 6.5mm Weatherby RPM
Representative trajectory — modeled from a single velocity input, not a measured load.
Dimensions
Reloading cost
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
Drawn to one scale from published dimensions. Bottleneck shape is approximate (shoulder geometry not recorded).
Connected reference
History
Introduced 2022 as the second Weatherby RPM-family cartridge (SAAMI drawing May 2022); MAP 65,000 psi.
FAQs
- What bullet diameter is .338 Weatherby RPM?
- .338 Weatherby RPM uses a 0.338″ (8.59 mm) diameter bullet.
- Is .338 Weatherby RPM still in production?
- .338 Weatherby RPM is active; typical availability is limited.
- What is .338 Weatherby RPM used for?
- .338 Weatherby RPM is primarily used for hunting.
- What is .338 Weatherby RPM based on?
- .338 Weatherby RPM is derived from the 6.5mm Weatherby RPM case.
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →