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Report By The Ordnance Select Committee

On the 26th of November, 1862, the Ordnance Select Committee published the following results of a series of trials made with the Whitworth and Enfield rifles.

The dimensions and constructions of the two rifles are stated below, the mean angle of elevation for a given range is tabulated, and also the mean radial deviation, or figure of merit. The experiments were instituted by the Secretary of State for War in the year 1861.

ENFIELD:- 

Diameter of bore 0.577in.
Pitch of rifling, 1 turn in 78ins.
No. of grooves 3 

WHITWORTH:-

Diameter across angles, 0.490in.
Diameter across flats, 0.451in.
Pitch of rifling, 1 turn in 20ins.
No. of grooves Hexagon.

  ENFIELD WHITWORTH
Range
Yards
Mean Radial
Deviation
Mean
Angle
Mean Radial
Deviation
Mean
Angle
  inches   inches  
300 12.69 0° 44' 8" 3.86 0° 56' 49"
500 19.80 1° 45' 13" 7.29 1° 23' 37"
800 41.61 2° 46' 6" 15.67 2° 17' 6"
1,000 95.01 4° 3' 33" 23.13 3° 5' 36"
1,200 133.53 5° 9' 48" 46.92 4° 3' 6"