155 mm B.B

Description

Nineteen perforated cylindrical propellant type M30A1, is a kind of triple base powder mainly containing Nitrocellulose (NC), Nitroglycerine (NG) and Nitroguanidine (NGu). This triple-base propellant (M30A1) is used in zone 8S for Gun 155mm GC-45 HOWITZER TECHNICAL SPECIFICATIONSLength16.5 – 17. 5mmHole diameter0.30 – 0.38 mmInner Web Thickness2.20 – 2.50 mmOuter Web Thickness2.50 – 2.90 mmExternal Diameter16.0 – 16.6 mmHeat of Explosion940 – 980 cal/gTotal volatile≤ 0.5%Stability at 120 °C≥ 40 min.  BALLISTIC SPECIFICATIONSWeight of Charge~ 16000 grAverage Muzzle Velocity897 m/s Average Chamber Pressure≤ 348 ma Std. Dev. of Velocity at 21°C≤ 2.4 m/s