Handgun
.338 JDJ No. 2
One of J.D.
- Caliber
- 0.338″ · 8.585 mm
- Case
- Bottleneck
- Status
- Wildcat
- Type
- Handgun
- Status
- Wildcat
- Availability
- Rare
- Primer
- Large Rifle
- Eff. range
- 200 yd
Ballistics
- Parent case
- —
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.
reloading data · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 8.59 | 0.338 | ✓ |
| Neck ⌀ | 9.20 | 0.362 | ✓ |
| Shoulder ⌀ | 11.53 | 0.454 | ✓ |
| Shoulder angle | 25° | — | ~ |
| Base ⌀ | 11.94 | 0.470 | ✓ |
| Rim ⌀ | 13.06 | 0.514 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.60 | 0.063 | ✓ |
| Neck length | 8.54 | 0.336 | ≈ |
| Case length | 56.52 | 2.225 | ✓ |
| Overall length | 75.57 | 2.975 | ✓ |
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 JDJ No. 2 is highlighted below.
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.
Connected reference
History
One of J.D. Joness SSK big-bore Contender wildcats, throwing .338 bullets for handgun hunting.
FAQs
- What bullet diameter is .338 JDJ No. 2?
- .338 JDJ No. 2 uses a 0.338″ (8.585 mm) diameter bullet.
- Is .338 JDJ No. 2 still in production?
- .338 JDJ No. 2 is wildcat; typical availability is rare.
Sources & provenance
- ManufacturerHornady Manufacturing — Handgun Data — 338 JDJ #2 (Obsolete Load Data) · bullet ⌀, velocity, grain weightsarchived
- ReferenceDBI Books (Frank C. Barnes) — Cartridges of the World, 8th ed. — proprietary/JDJ cartridges chapter · bullet ⌀
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
Lindcott Armory