Handgun · Wildcat
7mm International Rimmed
The .30-30 Winchester necked to 7mm — a rimmed wildcat suited to break-action and single-shot pistols..
- Caliber
- 0.284″ · 7.214 mm
- Introduced
- 1975
- Case
- Rimmed
- Parent
- .30-30 Winchester
- Primary use
- Hunting
- Status
- Wildcat
- Introduced
- 1975
- Type
- Handgun
- Origin
- United States
- Inventor
- Elgin Gates
- Manufacturer
- Handloaded only (wildcat; no factory ammunition)
- Standard
- Wildcat
- Status
- Wildcat
- Availability
- Rare
- Case capacity
- 40.7 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Large Rifle
- Case type
- Rimmed
- Max pressure
- 32,600 psi, SAAMI transducer
- Eff. range
- 200 yd
- Max range
- 4200 yd
- Recoil
- 6.8–9.5 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 7mm International Rimmed, 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
- .30-30 Winchester
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.
SAAMI · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.21 | 0.284 | ~ |
| Neck ⌀ | 7.90 | 0.311 | ~ |
| Shoulder ⌀ | 10.21 | 0.402 | ~ |
| Shoulder angle | 38° | — | ~ |
| Base ⌀ | 10.72 | 0.422 | ~ |
| Rim ⌀ | 12.85 | 0.506 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.60 | 0.063 | ~ |
| Neck length | 7.45 | 0.293 | |
| Case length | 51.82 | 2.040 | ~ |
| Overall length | 72.01 | 2.835 | |
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. 7mm International Rimmed is highlighted below.
Missing a dimension for 7mm International Rimmed? Some case measurements aren't in a published SAAMI/CIP drawing yet. Have a factory or reamer print? Send it → — verified hard-to-find data earns a free Lindcott sticker.
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
The 7mm International Rimmed was introduced in 1975 by Elgin Gates, based on the .30-30 Winchester case.
FAQs
- What twist rate does 7mm International Rimmed use?
- 7mm International Rimmed typically uses a 1:10 twist rate.
- What bullet diameter is 7mm International Rimmed?
- 7mm International Rimmed uses a 0.284″ (7.214 mm) diameter bullet.
- Is 7mm International Rimmed still in production?
- 7mm International Rimmed is wildcat; typical availability is rare.
- What is 7mm International Rimmed used for?
- 7mm International Rimmed is primarily used for hunting.
- What is 7mm International Rimmed based on?
- 7mm International Rimmed is derived from the .30-30 Winchester case.
Sources & provenance
- Reference Gun Digest Books (Krause) — Cartridges of the World · velocity, grain weights, bullet ⌀, year
- Secondary Wouter's Gundex (retro.co.za) — 7mm International Rimmed · year, bullet ⌀ archived
- Secondary CartridgeCollector.net — 7mm International (Rimmed) · bullet ⌀ archived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
