220 kg) at different muzzlevelocities, depending on the projectile. When firing armor-piercing projectiles, their muzzlevelocity was 2,500 feet per second
earlier 15-inch Mk I gun, which fired a heavy shell at a rather low muzzlevelocity, and instead fired a rather light shell at a high muzzlevelocity; this
shell at 3,000 ft/s (914 m/s) muzzlevelocity, with a range of 49,383 yd (45,156 m) at 40° elevation. The high muzzlevelocity of the prototype resulted in
Initially, the 5.5 inch gun fired a 100-pound (45 kg) shell, using four charges in two cartridges to give a maximum range table muzzlevelocity of 1,675 feet