.225 Winchester

.225 Winchester
.225 Winchester center with .223 Rem left and .308 Win right.
TypeRifle
Place of originUSA
Production history
DesignerWinchester
Designed1964
Specifications
Parent case.219 Zipper
Case typerimmed, bottleneck
Bullet diameter.224 in (5.7 mm)
Neck diameter.260 in (6.6 mm)
Shoulder diameter.406 in (10.3 mm)
Base diameter.422 in (10.7 mm)
Rim diameter.473 in (12.0 mm)
Rim thickness.049 in (1.2 mm)
Case length1.930 in (49.0 mm)
Overall length2.50 in (64 mm)
Rifling twist1-12"
Primer typeLarge rifle
Ballistic performance
Bullet mass/type Velocity Energy
40 gr (3 g) SP 4,020 ft/s (1,230 m/s) 1,436 ft⋅lbf (1,947 J)
50 gr (3 g) SP 3,768 ft/s (1,148 m/s) 1,577 ft⋅lbf (2,138 J)
55 gr (4 g) SP 3,643 ft/s (1,110 m/s) 1,621 ft⋅lbf (2,198 J)
60 gr (4 g) SP 3,428 ft/s (1,045 m/s) 1,566 ft⋅lbf (2,123 J)
Test barrel length: 24"
Source(s): Hodgdon

The .225 Winchester / 5.7x49mm cartridge was introduced in 1964 by the Winchester Repeating Arms Company.

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