Rifle · Not SAAMI standardized · Not standardizedObsolete
.475 Turnbull
.475 Turnbull is a rimmed bottlenecked rifle cartridge of United States origin.
- Caliber
- 0.475″ · 12.065 mm
- Introduced
- 2007
- Case
- Rimmed
- Parent
- .348 Winchester
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 2007
- Type
- Rifle
- Origin
- United States
- Inventor
- Doug Turnbull (with Dave Scovill)
- Manufacturer
- Turnbull Mfg. (brass); Cor-Bon (factory ammo)
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 91.6 gr H₂O
- Twist (typical)
- 1:20
- Primer
- Large Rifle
- Case type
- Rimmed
- Max pressure
- 42,000 psi, SAAMI transducer
- Eff. range
- 250 yd
- Max range
- 1250 yd
- Recoil
- 62.3–64.8 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .475 Turnbull, 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
- .348 Winchester
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.
mixed/other · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 12.06 | 0.475 | · |
| Neck ⌀ | 12.75 | 0.502 | · |
| Shoulder ⌀ | 13.64 | 0.537 | · |
| Shoulder angle | 17.25° | — | ≈ |
| Base ⌀ | 14.01 | 0.552 | · |
| Rim ⌀ | 15.49 | 0.610 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.78 | 0.070 | · |
| Neck length | 12.46 | 0.491 | |
| Case length | 55.88 | 2.200 | · |
| Overall length | 70.61 | 2.780 | · |
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. .475 Turnbull is highlighted below.
Missing a dimension for .475 Turnbull? 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
Introduced around 2007 by Doug Turnbull (with Dave Scovill), derived from the .348 Winchester.
FAQs
- What twist rate does .475 Turnbull use?
- .475 Turnbull typically uses a 1:20 twist rate.
- What bullet diameter is .475 Turnbull?
- .475 Turnbull uses a 0.475″ (12.065 mm) diameter bullet.
- Is .475 Turnbull still in production?
- .475 Turnbull is discontinued; typical availability is rare.
- What is .475 Turnbull used for?
- .475 Turnbull is primarily used for hunting.
- What is .475 Turnbull based on?
- .475 Turnbull is derived from the .348 Winchester case.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
