Lindcott Armory Rifle · Proprietary
.300 Dakota
Dakota Arms' proprietary .30-caliber magnum, built on the .404 Jeffery case blown out to .308.
- Caliber
- 0.308″ · 7.823 mm
- Introduced
- 1992
- Case
- Rimless
- Parent
- .404 Jeffery
- Primary use
- hunting
- Status
- Active
- Introduced
- 1992
- Type
- Rifle
- Origin
- United States
- Inventor
- Dakota Arms
- Manufacturer
- Dakota Arms
- Standard
- Proprietary
- Status
- Active
- Availability
- Rare
- Primer
- Large Rifle Magnum
- Case type
- Rimless
- Max pressure
- 65,000 psi
- Eff. range
- 600 yd
- Max range
- 600 yd
Ballistics
- Parent case
- .404 Jeffery
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 ⌀ | 7.82 | 0.308 | ✓ |
| Neck ⌀ | 8.59 | 0.338 | ✓ |
| Shoulder ⌀ | 13.49 | 0.531 | ✓ |
| Shoulder angle | 32° | — | ✓ |
| Base ⌀ | 13.84 | 0.545 | ✓ |
| Rim ⌀ | 13.84 | 0.545 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.27 | 0.050 | ✓ |
| Neck length | 7.87 | 0.310 | ≈ |
| Case length | 64.77 | 2.550 | ✓ |
| Overall length | 84.58 | 3.330 | ✓ |
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. .300 Dakota 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.
Lineage
Connected reference
History
Introduced by Dakota Arms in 1992 as the flagship of their proprietary magnum family, the .300 Dakota was designed to match .300 Weatherby performance without requiring a belted case or an extra-long magnum action. The .404 Jeffery parent case provides generous powder capacity and headspaces on the shoulder, eliminating the case stretch associated with belted designs.
FAQs
- What bullet diameter is .300 Dakota?
- .300 Dakota uses a 0.308″ (7.823 mm) diameter bullet.
- Is .300 Dakota still in production?
- .300 Dakota is active; typical availability is rare.
- What is .300 Dakota used for?
- .300 Dakota is primarily used for hunting.
- What is .300 Dakota based on?
- .300 Dakota is derived from the .404 Jeffery 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 →