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Rifle · Proprietary

7mm GT

7 GT7x46 GT

Necked-up 6 GT for PRS and ELR competition.

Caliber
0.284″ · 7.214 mm
Introduced
2022
Case
Rimless
Parent
6GT
Status
Active
Identity
Introduced
2022
Type
Rifle
Origin
United States
Inventor
Unknown / wildcat
Standard
Proprietary
Status
Active
Availability
Uncommon
Build
Primer
Boxer Large Rifle
Case type
Rimless
Pressure & range
Eff. range
1000 yd

Ballistics

Published velocity/energy data isn't available for 7mm GT. Parent case: 6 GT (necked up).

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
Measuremmin✓
Bullet ⌀7.210.284~
Neck ⌀——
Shoulder ⌀——
Shoulder angle——
Base ⌀——
Rim ⌀——
Belt ⌀n/a
Rim thickness——
Neck length——
Case length——
Overall length——

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

Immediate parent
6GT
Family TreeOpen 7mm GT in the interactive cartridge family tree↗

Connected reference

FirearmsFirearms in 7mm GT↗

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 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 based on?
7mm GT is derived from the 6 GT (necked up) 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 →