.450/400 Black Powder Express

The .450/400 Black Powder Express cartridges were black powder rifle cartridges introduced in the United Kingdom in the 1880s.

.450/400 31⁄4 inch Black Powder Express
Drawing of .360, .450/400 & .450 Black Powder Express cartridges
TypeRifle
Place of originUnited Kingdom
Production history
Designed1880s
Specifications
Parent case.450 Black Powder Express
Case typeRimmed, bottleneck
Bullet diameter.405 in (10.3 mm)
Neck diameter.432 in (11.0 mm)
Shoulder diameter.502 in (12.8 mm)
Base diameter.544 in (13.8 mm)
Rim diameter.615 in (15.6 mm)
Rim thickness.040 in (1.0 mm)
Case length3.25 in (83 mm)
Overall length3.85 in (98 mm)
Primer typeKynoch # 40
Ballistic performance
Bullet mass/type Velocity Energy
270 gr (17 g) Lead 1,850 ft/s (560 m/s) 2,050 ft⋅lbf (2,780 J)
Test barrel length: 26 inches (660 mm)
Source(s): Barnes & Kynoch.
.450/400 23⁄8 inch Black Powder Express
Specifications
Case length2.375 in (60.3 mm)
Ballistic performance
Bullet mass/type Velocity Energy
270 gr (17 g) Lead 1,650 ft/s (500 m/s) 1,630 ft⋅lbf (2,210 J)
Source(s): Barnes.
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