Rifle · Proprietary
7mm GT
Necked-up 6 GT for PRS and ELR competition.
- Caliber
- 0.284″ · 7.214 mm
- Introduced
- 2022
- Case
- Rimless
- Parent
- 6GT
- Primary use
- Hunting
- Status
- Active
- Introduced
- 2022
- Type
- Rifle
- Origin
- United States
- Inventor
- Unknown / wildcat
- Manufacturer
- Unknown / wildcat
- Standard
- Proprietary
- Status
- Active
- Availability
- Uncommon
- Case capacity
- 57.3 gr H₂O
- Twist (typical)
- 1:9
- Primer
- Boxer Large Rifle
- Case type
- Rimless
- Max pressure
- 62,000 psi, SAAMI transducer
- Eff. range
- 1000 yd
- Max range
- 4650 yd
- Recoil
- 17.8–27.2 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 7mm GT, 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
- 6GT
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 ⌀ | 7.93 | 0.312 | |
| Shoulder ⌀ | 11.32 | 0.446 | |
| Shoulder angle | 35° | — | |
| Base ⌀ | 11.95 | 0.470 | |
| Rim ⌀ | 11.96 | 0.471 | |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.37 | 0.054 | |
| Neck length | 7.45 | 0.293 | |
| Case length | 53.23 | 2.096 | |
| Overall length | 71.73 | 2.824 | |
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 GT is highlighted below.
Missing a dimension for 7mm GT? 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
Developed in 2022 as the 6 GT case was already established for reliable feeding in bolt guns and AR-10 platforms, the 7mm GT necks up to take advantage of the excellent high-BC 7mm bullets available for long-range competition. It is gaining traction in the PRS and ELR communities as an alternative to the 7mm PRC and 7mm Remington Magnum.
FAQs
- What twist rate does 7mm GT use?
- 7mm GT typically uses a 1:9 twist rate.
- What bullet diameter is 7mm GT?
- 7mm GT uses a 0.284″ (7.214 mm) diameter bullet.
- Is 7mm GT still in production?
- 7mm GT is active; typical availability is uncommon.
- What is 7mm GT used for?
- 7mm GT is primarily used for hunting.
- What is 7mm GT based on?
- 7mm GT is derived from the 6GT 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 →
