Lindcott Armory Rifle · Proprietary
.338 Spectre
Subsonic wildcat designed for suppressed carbines; uses blown-out .30 Carbine brass to seat heavy .338 caliber projectiles for subsonic suppressed use..
- Caliber
- 0.338″ · 8.585 mm
- Introduced
- 2000
- Case
- Rimless
- Parent
- .30 Carbine
- Status
- Active
- Introduced
- 2000
- Type
- Rifle
- Origin
- United States
- Inventor
- Marty ter Weeme / Teppo Jutsu
- Standard
- Proprietary
- Status
- Active
- Availability
- Uncommon
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Eff. range
- 150 yd
Ballistics
- Parent case
- .30 Carbine
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 ⌀ | 8.59 | 0.338 | ~ |
| Neck ⌀ | 9.17 | 0.361 | ~ |
| Shoulder ⌀ | — | — | |
| Shoulder angle | — | — | |
| Base ⌀ | 10.80 | 0.425 | ~ |
| Rim ⌀ | 10.77 | 0.424 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | — | — | |
| Neck length | — | — | |
| Case length | 31.50 | 1.240 | ~ |
| Overall length | 57.15 | 2.250 | ~ |
Missing a dimension for .338 Spectre? 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
ⓘ Most-direct documented parent is 10mm Magnum (not yet in the reference).
Connected reference
History
Developed by Col. Jeff Cooper and John Ricco, the .338 Spectre is built from blown-out .30 Carbine brass to accommodate heavy .338 caliber bullets at subsonic velocities. Combined with a suppressor it provides effective terminal performance at close range from a compact carbine with minimal sound signature. It has seen use in some special operations testing.
FAQs
- What bullet diameter is .338 Spectre?
- .338 Spectre uses a 0.338″ (8.585 mm) diameter bullet.
- Is .338 Spectre still in production?
- .338 Spectre is active; typical availability is uncommon.
- What is .338 Spectre based on?
- .338 Spectre is derived from the .30 Carbine (blown out) case.
Sources & provenance
- SecondaryCartridge Collector (cartridgecollector.net) — 338 Spectre · bullet ⌀, velocity, grain weightsarchived
- SecondaryThe Ballistic Assistant (theballisticassistant.com) — 338 Spectre: A Modern Subsonic Cartridge for the AR · bullet ⌀, velocityarchived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →