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.455 MK II
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Caliber Specifications:
Caliber: | .455 MK II |
Standard / Datasheet: | C.I.P. |
Bullet Diameter: | 0.455" | 11.56mm |
Primer Size: | Small Pistol (SP) |
Max. Case Length: | 0.767" | 19.48mm |
Max. Cartridge Length / OAL: | 1.260" | 32.00mm |
Max. Standardized Pressure: | 13053 psi | 900 bar |
Case Capacity: | 19.0 Grains of Water | 1.23 cm3 |
CID: | CID_780 |
Last updated: | 2/20/2025 |
- The .455 Mark II is a large-caliber, rimfire revolver cartridge developed in 1907 by Smith & Wesson.It was initially used in the Webley Mark VI revolver and remained in service with British forces through World War I. It has since seen its use declined due to its low velocities and bullet weights.
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Most popular powders from our community members for caliber .455 MK II:
Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.455 MK II load data available with the following bullets:
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