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.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 [1]

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

Description

Based on the .219 Zipper case but with a reduced rim diameter[2] to fit the common .473" bolt face, it was intended as a replacement for the .220 Swift cartridge which had a reputation for burning out barrels. Despite having a modern straight taper design, the round was eclipsed by the older .22-250 Remington, already a popular wildcat introduced commercially a year later.

The .225 Winchester was chambered in factory rifles by Winchester (Models 70 and 670) and Savage (Model 340). All commercially produced rifles chambered in .225 Winchester were turn-bolt or break actions. Winchester ceased producing rifles chambered in .225 Winchester in 1971, however seasonal production of loaded ammunition and brass continues by Winchester. Reloading dies for the round are readily available.

The .225 Winchester's case is a parent case for some of SSK Industries'[3] popular line of JDJ cartridges designed by J.D. Jones, chosen for its strength and semi-rimmed design which makes it well suited for use in break-open actions.[4]

See also

References

  1. ^ "225 Win data Hodgdon". Data.hodgdon.com. Archived from the original on 2007-11-11. Retrieved 2012-05-22.
  2. ^ Page, Warren (July 1970). "Thunder and Lightning". Field & Stream. LXXV (3): 68.
  3. ^ Mann, Richard A.; Barnes, Frank C., eds. (2012). Cartridges of the world : a complete and illustrated reference for over 1500 cartridges (13th ed.). Iola, Wis.: Krause. p. 228. ISBN 978-1440230592.
  4. ^ "Mr". 2010-03-28. Archived from the original on 2010-03-28. Retrieved 2012-05-22.
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