Test Gun: Colt 1911 Government, Officer's.
Barrel length: 5 and 3.5 inches.
Ammunition: Underwood .45 ACP 230gr +P Bonded JHP (Item 336).
Test media: 10% Vyse Ballistics Gel.
Distance: 10 feet.
Chronograph: Caldwell Ballistic Precision Chronograph G2.
Five shot velocity average: 974fps, 876fps
BB Calibration: 3.5 inches.
Underwood .45 ACP 230gr +P Bonded JHP in Vyse Ballistics Gel – General Cartridge (general-cartridge.com)