View Full Version : Temperature insensitive powder in the military

02-23-2010, 07:37 AM
Was reading on the characteristics of the German Reinmetall 120mm smoothbore used in most western tanks and found this interesting passage.

Most matches are within those temperatures----

From Wikipedia:

"Weighing in at 8.35 kilograms with a 38:1 length to diameter ratio and with a muzzle velocity of 1,750 meters per second (5,700 ft/s), the projectile has an effective engagement range of up to 4,000 meters (4,400 yd).[1] A further development, called the DM63, improved upon the round by introducing a new temperature independent propellant, which allows the propellant to have a constant pattern of expansion between ambient temperatures (inside the gun barrel) of anywhere between −47 C (−52.6 F) and +71 C (160 F). The new propellant powders, known as surface coated double base (SCDB) propellants, allow the DM63 to be used in a wide variety of climates without a negative impact on the projectile's performance."

brian roberts
02-23-2010, 02:25 PM
like the Hodgdon "extreme" powders, made for them by ADI(Australian Defense Industries). I believe this technology emerged in the early 70s in ADIs "Mulwex" powders.:):D