Rifle · CIP
.244 H&H Magnum
.244 H&H Magnum is a belted bottlenecked rifle cartridge of United Kingdom origin.
- Caliber
- 0.2449″ · 6.22 mm
- Introduced
- 1955
- Case
- Belted
- Parent
- .375 H&H Magnum
- Primary use
- Hunting
- Status
- Active
- Introduced
- 1955
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- David Lloyd
- Manufacturer
- Holland & Holland
- Standard
- CIP
- Status
- Active
- Availability
- Limited
- Case capacity
- 86.2 gr H₂O
- Twist (typical)
- 1:10.0
- Primer
- Large Rifle Magnum
- Case type
- Belted
- Max pressure
- 63,092 psi, CIP transducer
- Eff. range
- 400 yd
- Max range
- 2000 yd
- Recoil
- 14.6 ft·lb
Introduced by Holland & Holland
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .244 H&H Magnum, 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
- .375 H&H Magnum
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.
CIP TDCC · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 6.22 | 0.245 | ✓ |
| Neck ⌀ | 7.11 | 0.280 | ✓ |
| Shoulder ⌀ | 11.48 | 0.452 | ✓ |
| Shoulder angle | 25° | — | ≈ |
| Base ⌀ | 13.03 | 0.513 | ✓ |
| Rim ⌀ | 13.51 | 0.532 | ✓ |
| Belt ⌀ | 13.56 | 0.534 | ✓ |
| Rim thickness | 1.27 | 0.050 | ✓ |
| Neck length | 7.00 | 0.276 | ≈ |
| Case length | 70.87 | 2.790 | ✓ |
| Overall length | 91.44 | 3.600 | ✓ |
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. .244 H&H Magnum 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.
Firearms chambered in .244 H&H Magnum
Lineage
Connected reference
History
Introduced around 1955 by David Lloyd, derived from the .375 H&H Magnum.
FAQs
- What twist rate does .244 H&H Magnum use?
- .244 H&H Magnum typically uses a 1:10.0 twist rate.
- What bullet diameter is .244 H&H Magnum?
- .244 H&H Magnum uses a 0.2449″ (6.22 mm) diameter bullet.
- Is .244 H&H Magnum still in production?
- .244 H&H Magnum is active; typical availability is limited.
- What is .244 H&H Magnum used for?
- .244 H&H Magnum is primarily used for hunting.
- What is .244 H&H Magnum based on?
- .244 H&H Magnum is derived from the .375 H&H Magnum 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 →
