Rifle · CIP · Not SAAMI standardized · CIP standardizedObsolete
.240 Belted Rimless Nitro Express (.240 Apex)
.240 Belted Rimless Nitro Express (.240 Apex) is a belted bottlenecked rifle cartridge of United Kingdom origin.
- Caliber
- 0.2449″ · 6.22 mm
- Introduced
- 1919
- Case
- Belted
- Primary use
- Hunting
- Status
- Obsolete
- Obsolete
- Obsolete
- Introduced
- 1919
- Type
- Rifle
- Origin
- United Kingdom
- Inventor
- Holland & Holland
- Manufacturer
- Holland & Holland
- Standard
- CIP · Not SAAMI standardized · CIP standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Obsolete
- Availability
- Collector
- Case capacity
- 59.6 gr H₂O
- Twist (typical)
- 1:8.0
- Primer
- Kynoch # 81
- Case type
- Belted
- Max pressure
- 47,863 psi, CIP transducer
- Eff. range
- 400 yd
- Max range
- 2000 yd
- Recoil
- 8.6 ft·lb
Introduced by Holland & Holland
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .240 Belted Rimless Nitro Express (.240 Apex), 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
- —
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 ⌀ | 10.29 | 0.405 | ✓ |
| Shoulder angle | 17.4° | — | ≈ |
| Base ⌀ | 11.56 | 0.455 | ✓ |
| Rim ⌀ | 11.89 | 0.468 | ✓ |
| Belt ⌀ | 12.12 | 0.477 | ✓ |
| Rim thickness | 1.09 | 0.043 | ✓ |
| Neck length | 10.16 | 0.400 | ≈ |
| Case length | 63.50 | 2.500 | ✓ |
| Overall length | 82.55 | 3.250 | ✓ |
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. .240 Belted Rimless Nitro Express (.240 Apex) 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
Introduced around 1919 by Holland & Holland.
FAQs
- What twist rate does .240 Belted Rimless Nitro Express (.240 Apex) use?
- .240 Belted Rimless Nitro Express (.240 Apex) typically uses a 1:8.0 twist rate.
- What bullet diameter is .240 Belted Rimless Nitro Express (.240 Apex)?
- .240 Belted Rimless Nitro Express (.240 Apex) uses a 0.2449″ (6.22 mm) diameter bullet.
- Is .240 Belted Rimless Nitro Express (.240 Apex) still in production?
- .240 Belted Rimless Nitro Express (.240 Apex) is obsolete; typical availability is collector.
- What is .240 Belted Rimless Nitro Express (.240 Apex) used for?
- .240 Belted Rimless Nitro Express (.240 Apex) is primarily used for hunting.
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 →
