.50 Alaskan

.50 Alaskan
Left to Right (line by line) .44 Magnum, .445 Super Magnum, .45 Colt, .454 Casull, .480 Ruger, .475 Maximum, .50 Action Express, .500 Linebaugh, .500 Maximum, .500 S&W Magnum, .50 Beowulf, .50 Alaskan
Type	Rifle, Large game
Place of origin	United States
Production history
Designer	Harold Johnson
Designed	early 1950s
Produced	1952–present
Specifications
Parent case	.348 Winchester
Case type	Rimmed
Bullet diameter	.510 in (13.0 mm)
Neck diameter	.536 in (13.6 mm)
Base diameter	.553 in (14.0 mm)
Rim diameter	.610 in (15.5 mm)
Rim thickness	.070 in (1.8 mm)
Case length	2.10 in (53 mm)
Ballistic performance
Bullet mass/type Velocity Energy 450 gr (29 g) BAR FP 1,718 ft/s (524 m/s) 2,950 ft⋅lbf (4,000 J) 500 gr (32 g) JFP 1,674 ft/s (510 m/s) 3,112 ft⋅lbf (4,219 J) 525 gr (34 g) LFN GC 1,694 ft/s (516 m/s) 3,346 ft⋅lbf (4,537 J)
Source(s): Hodgdon[1]

The .50 Alaskan / 13x53mmR is a wildcat cartridge developed by Harold Johnson and Harold Fuller of the Kenai Peninsula of Alaska in the 1950s. Johnson based the cartridge on the .348 Winchester in order to create a rifle capable of handling the large bears in Alaska.