NAME – 15.6x70mmR (20 Gauge 2 ¾ Inch) Rifled Slug

TYPE – Shotgun shell

YEAR OF INTRODUCTION – 1890’s

COUNTRY OF ORIGIN – Great Britain

CASE TYPE – Rimmed straight

CARTRIDGE LENGTH – 6.22 cm (2.45 in)

CASING LENGTH – 7 cm (2.75 in)

CASE HEAD DIAMETER – 17.58 mm (0.692 in)

CASE RIM DIAMETER – 19.33 mm (0.761 in)

LOAD – Express Rifled Slug

LOAD WEIGHT – 17.7 g (0.625 oz – 273.4 grains)

PROJECTILE DIAMETER – 15.6 mm (0.615 in)

WEIGHT OF PROJECTILE – 17.7 g (273.4 grains)

TOTAL ROUND WEIGHT – 31.3 g (1.10 oz)

MUZZLE VELOCITY – 482 m/s (1580 fps)

NOMINAL BARREL LENGTH – 66 cm (26 in)

MUZZLE ENERGY – 2055 j (1516 ft/lb)

15 fps/in per 2 inchs bbl length from nominal