152mm long gun M. 1867

Bulgarian designation :			24-фунтово дълго оръдие
Russian designation :			24-фунтовая медная длинная пушка обр. 1867 г.
Calibre :			152.4mm L/21.25
Weight of the barrel :			2236 kg
Weight of the breech-block :			128 kg
Weight of the carriage :			725 kg (without wheels)
Weight in action :			3251 kg
Weight in marching order :			3866 kg
Weight of the platform :			1370 kg
Barrel length :			3.230 m
Barrel grooves	number :		24
	depth :		1.78 mm
	width :		12.7 mm
Battering charge :			2.87 kg 2.46 kg (shrapnel)
Cast iron bomb	length :		2 calibres (296 mm)
	weight :		29.2 kg – charge : 620 g of artillery gunpowder
	fuze :		percussion fuze of Prussian model : 105 g
	muzzle velocity :		325 m/s 6 lbs
	max. range :		5335 m
Shrapnel	weight :		35.5 kg – 628 bullets x 21.3 g x 15.9 mm
	fuze :		17 sec. time fuze
	muzzle velocity :		273 m/s
	max. range :		3490 m
Canister bomb	weight :		35.2 kg - charge : 0.1 kg of artillery gunpowder 230 ball x 23.5 g x 15.9 mm
	fuze :		7 sec. time fuze
	muzzle velocity :		283 m/s
	max. range :		1920 m
Case shot :	length :		1.55 calibres (236 mm)
	weight :		22.1 kg 132 balls x 138 g x 29.5 mm
Elevation :			+ 25° / - 3°
Wheels		weight :	290.7 kg (with travelling wheels 309 kg)
		height :	1473 mm (with travelling wheels 1626 mm)
		track :	1524 mm
Transport :			drawn by six horses
Remarks : Russian bronze fortress gun. In firing position, it should be placed on a wooden platform. It could fire both canister bomb (картечна бомба), an early model of shrapnel, and canister. It could also fire with reduced charges, but, according with Angel Angelov, the Bulgarian gunners were not trained to do it and in addition there were firing table only to fire at full charge. In 1896, the artillery engineer lt. Stefan Slavchev carried out plans to upgrade these guns. Their breech chambers were modified to use smokeless powder and the guns were equipped with arc sight. The changes were made in the Sofia artillery arsenal.

Pictures from Saint Petersburg Museum

Thanks to Biser Kolev