Rifle · Experimental · Not SAAMI standardized · Not standardizedObsolete
.338/416
Developmental .338 cartridge based on the .416 Rigby case and immediate predecessor to the .338 Lapua Magnum..
- Caliber
- 0.3382″ · 8.59 mm
- Introduced
- 1983
- Case
- Rimless
- Parent
- .416 Rigby
- Primary use
- Experimental, Long range
- Status
- Obsolete
- Obsolete
- Obsolete
- Introduced
- 1983
- Type
- Rifle
- Origin
- United States
- Inventor
- Research Armament Industries / Jim Bell / Boots Obermeyer
- Manufacturer
- Research Armament Industries / Jim Bell / Boots Obermeyer
- Standard
- Experimental · Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Obsolete
- Availability
- Collector
- Case capacity
- 122.5 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Large Rifle Magnum
- Case type
- Rimless
- Max pressure
- 42,500 psi, SAAMI transducer
- Eff. range
- 1500 yd
- Max range
- 5600 yd
- Recoil
- 52.5–56.9 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .338/416, 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
- .416 Rigby
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.
CIP TDCC · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.59 | 0.338 | ~ |
| Neck ⌀ | 9.46 | 0.372 | ~ |
| Shoulder ⌀ | 14.18 | 0.558 | |
| Shoulder angle | 44.9° | — | |
| Base ⌀ | 14.96 | 0.589 | ~ |
| Rim ⌀ | 14.99 | 0.590 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.65 | 0.065 | ~ |
| Neck length | 8.87 | 0.349 | |
| Case length | 71.00 | 2.795 | ~ |
| Overall length | 94.57 | 3.723 | |
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. .338/416 is highlighted below.
Missing a dimension for .338/416? Some case measurements aren't in a published SAAMI/CIP drawing yet. Have a factory or reamer print? Send it → — verified hard-to-find data earns a free Lindcott sticker.
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
A key bridge connecting the .416 Rigby family to the finalized .338 Lapua Magnum (CIP 1989).
FAQs
- What twist rate does .338/416 use?
- .338/416 typically uses a 1:10 twist rate.
- What bullet diameter is .338/416?
- .338/416 uses a 0.3382″ (8.59 mm) diameter bullet.
- Is .338/416 still in production?
- .338/416 is obsolete; typical availability is collector.
- What is .338/416 used for?
- .338/416 is primarily used for experimental, long range.
- What is .338/416 based on?
- .338/416 is derived from the .416 Rigby case.
Sources & provenance
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
- Secondary 338 Lapua Magnum · velocity_max_fps
- Secondary History and Performance of the .338 Lapua Magnum · velocity_max_fps
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
