.25-35 Winchester

.25-35 Winchester
.25-35 Winchester (center) with .223 Rem (left) and .308 Win (right).
Type	Rifle
Place of origin	United States
Production history
Designer	Winchester
Designed	1895
Manufacturer	Winchester
Produced	1895–present
Variants	.25-35 Ackley Improved, 6.5×52mmR
Specifications
Parent case	.30-30 Winchester
Case type	Rimmed, bottlenecked
Bullet diameter	.258 in (6.6 mm)
Neck diameter	.282 in (7.2 mm)
Shoulder diameter	.365 in (9.3 mm)
Base diameter	.422 in (10.7 mm)
Rim diameter	.506 in (12.9 mm)
Rim thickness	.063 in (1.6 mm)
Case length	2.043 in (51.9 mm)
Overall length	2.55 in (65 mm)
Rifling twist	1 in 8 in (200 mm)
Primer type	Large Rifle
Maximum pressure	44,000 psi (300 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 60 gr (4 g) JFP 3,026 ft/s (922 m/s) 1,220 ft⋅lbf (1,650 J) 75 gr (5 g) JFP 2,815 ft/s (858 m/s) 1,320 ft⋅lbf (1,790 J) 90 gr (6 g) LFP 2,513 ft/s (766 m/s) 1,458 ft⋅lbf (1,977 J) 117 gr (8 g) RN 2,357 ft/s (718 m/s) 1,444 ft⋅lbf (1,958 J)
Test barrel length: 24" Source(s): Hodgdon [1]

The .25-35 Winchester Center Fire (6.6x51mmR) was introduced in 1895 by Winchester for the Winchester Model 1894. Together with the .30-30 Winchester, it was one of the earliest smokeless cartridges designed in North America for a sporting rifle.^[2] Savage adopted it for its Savage Model 99 lever-action rifles. The case was based on the .30-30 cartridge.