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Lindcott Armory

Revolver · Not SAAMI standardized

.475 Linebaugh

Also known as 12.1x35mmR

John Linebaugh's original big-bore revolver cartridge, the direct parent of the .480 Ruger.

Caliber
0.475″ · 12.065 mm
Introduced
1988
Case
Rimmed
Parent
.45-70 Government
Primary use
Hunting
Status
Active

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VelocityBeing verified
EnergyBeing verified
Typical grains370 · 400 · 440 gr
Identity
Introduced
1988
Type
Revolver
Origin
United States
Inventor
John Linebaugh
Manufacturer
Buffalo Bore, various custom
Standard
Not SAAMI standardized
Status
Active
Availability
Rare
Build
Case capacity
55 gr H₂O
Twist (typical)
1:24
Primer
Large Pistol
Case type
Rimmed
Pressure & range
Max pressure
50,000 psi
Eff. range
75 yd
Max range
200 yd
Recoil
30–45 ft·lb
Subsonic
Capable

Ballistics

Published velocity/energy data isn't available for .475 Linebaugh. Parent case: .45-70 Government (modified).

Performance

Best for Withheld until verified
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.

SAAMI · approximate
Measuremmin✓
Bullet ⌀ 12.060.475 ✓
Neck ⌀ 12.800.504 ✓
Shoulder ⌀ n/a
Shoulder angle n/a
Base ⌀ 12.800.504 ✓
Rim ⌀ 13.770.542 ~
Belt ⌀ n/a
Rim thickness 1.650.065 ✓
Neck length n/a
Case length 35.561.400 ✓
Overall length 44.831.765 ✓

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. .475 Linebaugh 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.

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

Firearms chambered in .475 Linebaugh

11 models in the database chamber .475 Linebaugh. Browse all →

Taurus Raging Hunter 480 Ruger 8.37-inchFreedom Arms Model 83 480 RugerRuger Redhawk .480 Ruger 7.5-inchRuger Super Redhawk .480 Ruger 7.5-inchFreedom Arms Model 83 .475 Linebaugh 7.5-inchFreedom Arms Freedom Arms Model 83 .475 Linebaugh 7.5-inchFreedom Arms Model 83 475 Linebaugh 6-inchFreedom Arms Model 83 475 LinebaughFreedom Arms Model 83 454 Casull 6-inchFreedom Arms Model 83 357 Mag 4.75-inchWinchester Repeating Arms Model 94 .475 Linebaugh 20-inch

Lineage

Immediate parent
.45-70 Government
Direct descendants (1)
.480 Ruger
Family TreeOpen .475 Linebaugh in the interactive cartridge family tree

Connected reference

Loads18 factory loads for .475 LinebaughFirearmsFirearms in .475 Linebaugh

History

Developed by John Linebaugh in 1988 for wilderness and African dangerous-game hunting from a revolver. The .475 Linebaugh requires custom five-shot revolvers — typically single-action conversions of Ruger Super Blackhawks — as no production revolvers originally chambered it. Ruger and Hornady's response was the .480 Ruger (2003), a lower-pressure version for production revolvers. Buffalo Bore and other specialty loaders still produce factory ammunition.

FAQs

What twist rate does .475 Linebaugh use?
.475 Linebaugh typically uses a 1:24 twist rate.
What bullet diameter is .475 Linebaugh?
.475 Linebaugh uses a 0.475″ (12.065 mm) diameter bullet.
Is .475 Linebaugh still in production?
.475 Linebaugh is active; typical availability is rare.
What is .475 Linebaugh used for?
.475 Linebaugh is primarily used for hunting.
What is .475 Linebaugh based on?
.475 Linebaugh is derived from the .45-70 Government (modified) case.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 18 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →