[cuban leaf]

It’s like a man made meteor strike. It doesn’t even need an explosive charge. Kinetic energy will do the work.

[KarlInOhio]

At mach 7 the projectile will have 2,837 joules of kinetic energy per gram of mass. TNT only has 4182 joules of chemical energy per gram of mass. Since it isn't made of pure explosives, it probably has more kinetic energy than explosive energy.

For the non-physisist, there are 3.6 million joules of energy in 1 kilowatt-hour of electricity.