Rifle · SAAMI
.222 Remington Magnum
Lengthened .222 Remington case offering greater powder capacity and velocity.
- Caliber
- 0.224″ · 5.69 mm
- Introduced
- 1958
- Case
- Rimless
- Parent
- .222 Remington
- Primary use
- Varmint, Target
- Status
- Active
- Introduced
- 1958
- Type
- Rifle
- Origin
- United States
- Inventor
- Remington
- Manufacturer
- Remington Arms
- Standard
- SAAMI
- Status
- Active
- Availability
- Limited
- Case capacity
- 30.5 gr H₂O
- Twist (typical)
- 1:14
- Primer
- Small Rifle
- Case type
- Rimless
- Max pressure
- 54,000 psi
- Eff. range
- 300 yd
- Max range
- 600 yd
- Recoil
- 4.5–7 ft·lb
Introduced by Remington Arms
Ballistics
Published velocity/energy data isn't available for .222 Remington Magnum. Parent case: .222 Remington.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
Wikipedia · secondary source| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 5.69 | 0.224 | · |
| Neck ⌀ | 6.43 | 0.253 | · |
| Shoulder ⌀ | 9.07 | 0.357 | · |
| Shoulder angle | 23° | — | · |
| Base ⌀ | 9.55 | 0.376 | · |
| Rim ⌀ | 9.60 | 0.378 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | — | — | |
| Neck length | 6.71 | 0.264 | ≈ |
| Case length | 46.99 | 1.850 | · |
| Overall length | 57.91 | 2.280 | · |
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. .222 Remington Magnum is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
6 reloading powders listed for .222 Remington Magnum, fastest to slowest. Cross-reference in the finder →
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 in 1958 as a longer, higher-capacity version of the successful .222 Remington. Competed directly in the US Army's SALVO project trials against what became the 5.56x45mm NATO. The military selected a slightly different case (which became 5.56 NATO) and the .222 Remington Magnum found its niche as a commercial varmint and benchrest cartridge. Factory ammunition is still produced but in limited quantities.
FAQs
- What twist rate does .222 Remington Magnum use?
- .222 Remington Magnum typically uses a 1:14 twist rate.
- What bullet diameter is .222 Remington Magnum?
- .222 Remington Magnum uses a 0.224″ (5.69 mm) diameter bullet.
- Is .222 Remington Magnum still in production?
- .222 Remington Magnum is active; typical availability is limited.
- What is .222 Remington Magnum used for?
- .222 Remington Magnum is primarily used for varmint, target.
- What is .222 Remington Magnum based on?
- .222 Remington Magnum is derived from the .222 Remington case.
- What are the best powders for .222 Remington Magnum?
- Reloading powders commonly listed for .222 Remington Magnum include N130, Benchmark, H322, Reloader 10x, among 6 suitable options.
Sources & provenance
- Standard SAAMI — SAAMI cartridge & chamber drawing — .222 Remington Magnum
- Standard SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) — ANSI/SAAMI Z299.4 – 2015 (Centerfire Rifle) — Velocity & Pressure / Cartridge & Chamber Drawings · grain_ballistics, representative_gun archived
- Manufacturer Nosler — 222 Remington Magnum 50gr Ballistic Tip Varmint NoslerCustom Ammunition (SKU 06088) · grain_ballistics, representative_gun
- Manufacturer Nosler — 22 Caliber 50gr Ballistic Tip Varmint bullet, part #39522 (component spec) · grain_ballistics, representative_gun archived
- Manufacturer Nosler — 222 Rem Mag 50gr FBHP NoslerCustom Ammunition (SKU 02025) — sibling 50gr load · grain_ballistics, representative_gun archived
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 20 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →