What twist rate does .33-47 use?

.33-47 typically uses a 1:12 twist rate.

What bullet diameter is .33-47?

.33-47 uses a 0.338″ (8.585 mm) diameter bullet.

Is .33-47 still in production?

.33-47 is obsolete; typical availability is antique.

What is .33-47 used for?

.33-47 is primarily used for hunting.

What is .33-47 based on?

.33-47 is derived from the .32-40 Winchester case.

Lindcott Armory

Rifle · Obsolete

.33-47

Also known as 33-47

Pope/Schalk-era wildcat associated with H.M.

Caliber: 0.338″ · 8.585 mm
Introduced: 1900
Case: Rimmed
Parent: .32-40 Winchester
Primary use: hunting
Status: Obsolete

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VelocityBeing verified

EnergyBeing verified

Typical grains125 · 155 · 175 gr

Identity

Introduced: 1900
Type: Rifle
Origin: United States
Inventor: European benchrest community
Manufacturer: Various
Standard: Obsolete
Status: Obsolete
Availability: Antique

Build

Case capacity: 32 gr H₂O
Twist (typical): 1:12
Primer: Large Rifle
Case type: Rimmed

Pressure & range

Max pressure: 25,000 psi
Eff. range: 150 yd
Recoil: 8–12 ft·lb
Subsonic: Capable

Ballistics

Published velocity/energy data isn't available for .33-47 — an obsolete/collector cartridge. Parent case: .32-40 Winchester.

Performance

Best for Withheld until verified

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 ⌀	8.59	0.338	·
Neck ⌀	9.04	0.356	~
Shoulder ⌀	n/a
Shoulder angle	n/a
Base ⌀	10.77	0.424	·
Rim ⌀	12.85	0.506	·
Belt ⌀	n/a
Rim thickness	1.60	0.063	·
Neck length	n/a
Case length	54.10	2.130	·
Overall length	65.79	2.590	~

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. .33-47 is highlighted below.

Factory loads

Verification

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.

Powder $/lb Charge (gr) Bullet $/ea Primer $/ea Brass reuses Brass $/ea

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Lineage

Family TreeOpen .33-47 in the interactive cartridge family tree

Connected reference

Loads20 factory loads for .33-47 FirearmsFirearms in .33-47

History

A proprietary British double rifle cartridge from the early 20th century, developed for use on medium African and Indian game. One of many specialized British nitro express cartridges that served hunters during the golden age of African safari. Rarely encountered today except in old double rifles.

FAQs

What twist rate does .33-47 use?: .33-47 typically uses a 1:12 twist rate.
What bullet diameter is .33-47?: .33-47 uses a 0.338″ (8.585 mm) diameter bullet.
Is .33-47 still in production?: .33-47 is obsolete; typical availability is antique.
What is .33-47 used for?: .33-47 is primarily used for hunting.
What is .33-47 based on?: .33-47 is derived from the .32-40 Winchester case.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 20 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →