Rifle · Not SAAMI standardized · Not standardizedObsolete
14.5mm JDJ
14.5mm JDJ is a rimless straight-walled rifle cartridge of United States origin.
- Caliber
- 0.585″ · 14.859 mm
- Introduced
- 1980
- Case
- Rimless
- Parent
- .50 BMG
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1980
- Type
- Rifle
- Origin
- United States
- Inventor
- J. D. Jones
- Manufacturer
- SSK Industries
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 187.4 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Large Rifle
- Case type
- Rimless
- Max pressure
- 53,700 psi, CIP transducer
- Eff. range
- 300 yd
- Max range
- 1500 yd
- Recoil
- 353.5 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 14.5mm JDJ, 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
- .50 BMG
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.
Dimensions · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 14.86 | 0.585 | · |
| Neck ⌀ | 15.65 | 0.616 | |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 20.42 | 0.804 | |
| Rim ⌀ | 20.42 | 0.804 | |
| Belt ⌀ | n/a | ||
| Rim thickness | 2.26 | 0.089 | |
| Neck length | n/a | ||
| Case length | 59.53 | 2.344 | |
| Overall length | 78.68 | 3.098 | |
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. 14.5mm JDJ is highlighted below.
Missing a dimension for 14.5mm JDJ? 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
derived from the .50 BMG.
FAQs
- What twist rate does 14.5mm JDJ use?
- 14.5mm JDJ typically uses a 1:16 twist rate.
- What bullet diameter is 14.5mm JDJ?
- 14.5mm JDJ uses a 0.585″ (14.859 mm) diameter bullet.
- Is 14.5mm JDJ still in production?
- 14.5mm JDJ is discontinued; typical availability is rare.
- What is 14.5mm JDJ used for?
- 14.5mm JDJ is primarily used for hunting.
- What is 14.5mm JDJ based on?
- 14.5mm JDJ is derived from the .50 BMG 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 →
