Revolver · SAAMI
.327 Federal Magnum
A high-pressure .32-caliber magnum that fits 6 rounds where a .357 Magnum holds 5.
- Caliber
- 0.312″ · 7.925 mm
- Introduced
- 2008
- Case
- Rimmed
- Parent
- .32 H&R Magnum
- Primary use
- Self-Defense, Concealed Carry
- Status
- Active
- Introduced
- 2008
- Type
- Revolver
- Origin
- United States
- Inventor
- Federal Premium / Ruger
- Manufacturer
- Federal Premium
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Case capacity
- 19 gr H₂O
- Twist (typical)
- 1:16
- Primer
- Small Pistol
- Case type
- Rimmed
- Max pressure
- 45,000 psi, SAAMI transducer
- Eff. range
- 75 yd
- Max range
- 2050 yd
- Recoil
- 5–8 ft·lb
- Subsonic
- Capable
Introduced by Federal Premium
Ballistics
Published velocity/energy data isn't available for .327 Federal Magnum. Parent case: .32 H&R Magnum.
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 · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.92 | 0.312 | ✓ |
| Neck ⌀ | 8.56 | 0.337 | ✓ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 8.56 | 0.337 | ✓ |
| Rim ⌀ | 9.53 | 0.375 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.40 | 0.055 | ~ |
| Neck length | n/a | ||
| Case length | 30.48 | 1.200 | ✓ |
| Overall length | 37.47 | 1.475 | ✓ |
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. .327 Federal Magnum is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
2 reloading powders listed for .327 Federal 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.
Firearms chambered in .327 Federal Magnum
Lineage
Connected reference
History
Developed jointly by Federal and Ruger in 2008. The .32 caliber bore allows a 6-shot cylinder where .357 Magnum can only fit 5 in J-frame revolvers. Intended as a modern small-frame magnum with lower recoil than .357.
FAQs
- What twist rate does .327 Federal Magnum use?
- .327 Federal Magnum typically uses a 1:16 twist rate.
- What bullet diameter is .327 Federal Magnum?
- .327 Federal Magnum uses a 0.312″ (7.925 mm) diameter bullet.
- Is .327 Federal Magnum still in production?
- .327 Federal Magnum is active; typical availability is common.
- What is .327 Federal Magnum used for?
- .327 Federal Magnum is primarily used for self-defense, concealed carry.
- What is .327 Federal Magnum based on?
- .327 Federal Magnum is derived from the .32 H&R Magnum case.
- What are the best powders for .327 Federal Magnum?
- Reloading powders commonly listed for .327 Federal Magnum include HP-38, HS-6.
Sources & provenance
- Standard SAAMI — ANSI/SAAMI Z299.3-2022 — Centerfire Pistol & Revolver Voluntary Performance Standards · representative_gun, grain_ballistics archived
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Manufacturer Federal Premium — American Eagle Handgun 327 Federal Magnum 100 Grain (AE327) · grain_ballistics, representative_gun
- Manufacturer Federal Premium — American Eagle Handgun 327 Federal Magnum 85 Grain (AE327A) · representative_gun, grain_ballistics archived
- Manufacturer Speer — Gold Dot Handgun Personal Protection 327 Federal Magnum 100 Grain (23913GD) · grain_ballistics, representative_gun archived
- Manufacturer Federal Premium — Personal Defense HST 327 Federal Magnum 104 Grain (P327HST1S) · representative_gun, grain_ballistics archived
- Manufacturer Hornady — 327 Fed Mag 80 gr FTX Critical Defense · grain_ballistics, representative_gun archived
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 66 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
