.475 Linebaugh Load Data
Alternative names: .475 Linebaugh Revolver, .475 Linebaugh Cartridge, .475 LB
Our load data for caliber .475 Linebaugh covers 3 bullets from 2 manufacturers and a total of 0 load recipes. In addition, our members have shared 0 load recipes.
Caliber Overview
The .475 Linebaugh (12.1×36mmR) is a rimmed revolver cartridge designed by John Linebaugh in 1988, developed in response to the scarcity of .348 Winchester brass required to form his .500 Linebaugh cartridge. It was first publicly announced in the May 1988 issue of Guns & Ammo.
The cartridge is based on the .45-70 Government case trimmed to 1.4 inches and loaded with .475-inch-diameter (12.1 mm) bullets. Bullet weights range from 320 to 440 grains. Key dimensions include a case length of 1.4 in (36 mm), an overall length of 1.77 in (45 mm), a large pistol primer, and a maximum pressure of 50,000 psi.
A 370-grain bullet at 1,495 fps develops 1,840 ft·lbf of energy, and a 440-grain bullet at 1,360 fps develops 1,800 ft·lbf. In longer rifle barrels, velocities can reach 1,650 to 1,800 fps. The cartridge offers deep penetration and exceptional knockdown power, making it a favorite among handgun hunters in North America and Africa for game like bison, moose, and even elephants.
In 1991, Linebaugh announced a longer 1.6 in variant known as the .475 Linebaugh Long or .475 Linebaugh Maximum, producing somewhat greater ballistic performance. The .480 Ruger, introduced in 2003 by Ruger and Hornady, is a commercially produced derivative based on a shortened .475 Linebaugh case, making the caliber more widely accessible in production revolvers.
