Rifle · SAAMI standardized
6mm PRC
Hornady's precision rifle cartridge introduced in 2021.
- Caliber
- 0.243″ · 6.172 mm
- Introduced
- 2021
- Case
- Rimless
- Parent
- 6.5 PRC
- Primary use
- Hunting, Target/Competition
- Status
- Active
- Introduced
- 2021
- Type
- Rifle
- Origin
- United States
- Inventor
- Hornady
- Manufacturer
- Hornady
- Standard
- SAAMI standardized
- Status
- Active
- Availability
- Common
- Case capacity
- 65 gr H₂O
- Twist (typical)
- 1:7.5
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Max pressure
- 65,000 psi
- Eff. range
- 600 yd
- Recoil
- 8–12 ft·lb
Introduced by Hornady
Ballistics
Published velocity/energy data isn't available for 6mm PRC.
Performance
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 ⌀ | 6.17 | 0.243 | ~ |
| Neck ⌀ | 6.88 | 0.271 | ~ |
| Shoulder ⌀ | 13.12 | 0.517 | ~ |
| Shoulder angle | 30° | — | ~ |
| Base ⌀ | 13.45 | 0.530 | ~ |
| Rim ⌀ | 13.51 | 0.532 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.27 | 0.050 | ~ |
| Neck length | — | — | |
| Case length | 51.56 | 2.030 | ~ |
| Overall length | 75.06 | 2.955 | ~ |
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. 6mm PRC is highlighted below.
Missing a dimension for 6mm PRC? 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.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
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
Hornady introduced this long-range precision rifle cartridge in 2021 based on a shortened .300 PRC case. Designed to drive high-BC 6mm bullets at extreme velocities with excellent accuracy. Targets ELR competition shooters seeking better performance than 6.5mm cartridges in a slightly smaller package.
FAQs
- What twist rate does 6mm PRC use?
- 6mm PRC typically uses a 1:7.5 twist rate.
- What bullet diameter is 6mm PRC?
- 6mm PRC uses a 0.243″ (6.172 mm) diameter bullet.
- Is 6mm PRC still in production?
- 6mm PRC is active; typical availability is common.
- What is 6mm PRC used for?
- 6mm PRC is primarily used for hunting, target/competition.
Sources & provenance
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Reference Gun Digest Books — Cartridges of the World (Gun Digest Books, F. C. Barnes) · parent_cartridge
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 14 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →