Rifle · Not SAAMI standardized · Not standardizedObsolete
.375 Viersco Magnum
.375 Viersco Magnum is a rimless bottlenecked rifle cartridge of United States origin.
- Caliber
- 0.375″ · 9.525 mm
- Introduced
- 1990
- Case
- Rimless
- Primary use
- Hunting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1990
- Type
- Rifle
- Origin
- United States
- Inventor
- Viersco, MFG
- Manufacturer
- Viersco
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Rare
- Case capacity
- 202.5 gr H₂O
- Twist (typical)
- 1:10.0
- Primer
- Large Rifle
- Case type
- Rimless
- Max pressure
- 64,800 psi, SAAMI transducer
- Eff. range
- 300 yd
- Max range
- 1500 yd
- Recoil
- 62.8–80.9 ft·lb
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .375 Viersco Magnum, 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
- —
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.
Wikipedia · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 9.53 | 0.375 | · |
| Neck ⌀ | 10.11 | 0.398 | · |
| Shoulder ⌀ | 16.87 | 0.664 | · |
| Shoulder angle | 21.2° | — | |
| Base ⌀ | 17.27 | 0.680 | · |
| Rim ⌀ | 17.14 | 0.675 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.65 | 0.065 | · |
| Neck length | 9.84 | 0.387 | |
| Case length | 87.50 | 3.445 | · |
| Overall length | 105.41 | 4.150 | · |
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. .375 Viersco Magnum is highlighted below.
Missing a dimension for .375 Viersco Magnum? 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.
Connected reference
History
Developed by Viersco, MFG.
FAQs
- What twist rate does .375 Viersco Magnum use?
- .375 Viersco Magnum typically uses a 1:10.0 twist rate.
- What bullet diameter is .375 Viersco Magnum?
- .375 Viersco Magnum uses a 0.375″ (9.525 mm) diameter bullet.
- Is .375 Viersco Magnum still in production?
- .375 Viersco Magnum is discontinued; typical availability is rare.
- What is .375 Viersco Magnum used for?
- .375 Viersco Magnum is primarily used for hunting.
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 →
