76mm mountain gun M. 1867

Bulgarian designation :			3-фунтово планинско оръдие
Russian designation :			3-фунтовая горная пушка обр. 1867 г.
Calibre :			76.2mm L/9.8
Weight of the barrel :			96.4 kg / 101.5 kg
Weight of the breech-block :			17.8 kg
Weight of the carriage :			144 kg
Weight in action :			245 kg
Weight of the shaft :			41.1 kg
Barrel length :			0.749 m
Length of the rifled part :			342 mm (4.5 calibres)
Barrel grooves	number :		12
	depth :		1.27 mm
	width :		13.6 mm
Length of twist :			2666.8 mm (35 calibres)
Length of the carriage :			1651 mm
Battering charge :			341 g (full charge) 136 g and 77 g (reduced charges for common shell)
Common shell	length :		2 calibres
	weight :		3.99 kg – charge: 154 g of artillery gunpowder
	fuze :		percussion fuze M. 1875 – 205 g
	muzzle velocity :		213 m/s (full charge) 128 m/s (mid charge) 95 m/s (reduced charge)
	max. range :		1494 m (full charge) 1067 m (mid charge) 640 m (reduced charge)
Canister shell	weight :		4.57 kg – charge : 38 g of artillery gunpowder 100 bullets x 12 g
	fuze :		8 sec. time fuze M. 1875
	muzzle velocity :		201 m/s
	max. range :		1494 m
Case shot	weight :		3.96 kg – 41 lead balls x 73.8 g x 24.1 mm
	max. range :		320 m
Angle of elevation :			500 m – 3° 20’ 1000 m – 7° 10’ 1500 m – 11° 39’
Length of the line of sight  :			690.8 mm
Elevation :			+ 15° / - 7°
Wheels		weight :	52.7 kg
		height :	574 mm
		track :	800 mm
Transport :			3 loads (1 – gun, 2 – carriage and axle, 3 – wheels)
Ammunition :			14 ammunition boxes per gun : each box carried 7 rounds and weighted 49.5 kg
Remarks : Russian bronze mountain gun. The carriage was made of iron. It could fire both canister shell (картечна граната), an early model of shrapnel, and case shot. The sigh was graduated according with the range, but, as all the Russian guns of the time, was the measures were not expressed in meters, but in sagenes (2.13 m), from 100 to 700 sagenes. As a rule the gun was transported dismantled in three loads, with another horse carrying two ammunition boxes. Only exceptionally, on short rides on level ground or to change quickly the position during fighting, the gun could be attached to the shaft “à limonière”. In fact the wheels were too little and too weak to allow a prolonged march, especially on uneven ground. From 1881 in the Turkestan mountain horse batteries of the Russian Army this gun was drawn by two horses, but this model was not delivered to the Bulgarian artillery.