.327 Federal Magnum

.327 Federal Magnum
.327 Federal Magnum (left) with a .357 Magnum (right)
Type	Revolver
Place of origin	United States
Production history
Designer	Federal Premium Ammunition and Sturm, Ruger & Co.
Designed	2007
Produced	2008–present
Specifications
Parent case	.32 H&R Magnum
Case type	Rimmed, straight
Bullet diameter	.312 in (7.9 mm)
Neck diameter	.337 in (8.6 mm)
Base diameter	.337 in (8.6 mm)
Rim diameter	.375 in (9.5 mm)
Rim thickness	.055 in (1.4 mm)
Case length	1.20 in (30 mm)
Overall length	1.47 in (37 mm)
Primer type	Small pistol magnum
Maximum pressure	45,000 psi (310 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 100 gr (6 g) JHP 1,400 ft/s (430 m/s) 435 ft⋅lbf (590 J) 115 gr (7 g) JHP 1,300 ft/s (400 m/s) 431 ft⋅lbf (584 J) 100 gr (6 g) JHP* 1,655 ft/s (504 m/s) 640 ft⋅lbf (870 J) 115 gr (7 g) JHP* 1,587 ft/s (484 m/s) 620 ft⋅lbf (840 J)
Test barrel length: 3 1/16 in, * 51⁄2" Blackhawk Revolver Source(s): Outdoor Writers[1] * Ballistics by the inch[2]

The .327 Federal Magnum is a cartridge introduced by Federal Premium Ammunition and also sold by Sturm, Ruger & Co. It is intended to provide the power of a .357 Magnum in six-shot, compact revolvers, whose cylinders would otherwise only hold five rounds. The .327 has also been used in full-sized revolvers with a capacity of seven rounds or more. The .327 Federal Mag is an example of a "super magnum", because it is a magnum of a magnum, the .32 H&R Magnum.^[3]