18.5x70mmR (12 Gauge 2 ¾ inch) Rifled Slug

NAME – 18.5x70mmR (12 Gauge 2 ¾ inch) Rifled Slug

TYPE – Shotgun shell

YEAR OF INTRODUCTION – 1862 [1877]

COUNTRY OF ORIGIN – Europe [USA]

CASE TYPE – Rimmed straight

CARTRIDGE LENGTH – 6.2 cm (2.440 in)

CASING LENGTH – 7 cm (2.76 in)

CASE HEAD DIAMETER – 18.9 mm (0.744 in)

CASE RIM DIAMETER – 20.8 mm (0.819 in)

LOAD – Express Rifled Slug

LOAD WEIGHT – 28.4 g (1.0 oz – 437.5 grains)

PROJECTILE DIAMETER – 18.5 mm (0.73 in)

WEIGHT OF PROJECTILE – 28.4 g (437.5 grains)

TOTAL ROUND WEIGHT – 40 g (1.41 oz)

MUZZLE VELOCITY – 475 m/s (1560 fps)

NOMINAL BARREL LENGTH – 76.2 cm (30 in)

MUZZLE ENERGY – 3206 j (2365 ft/lb)

15 fps/in per 2 inchs bbl length from nominal