US Navy achieves test practice on rail gun with capabilities of launching projectiles at Mach 7,
This rail gun hit with 32 megajoules of force (one megajoule can move a 1-ton
object at 100 mph. It is also reported that it goes from zero to 5,000 mph in the span of
1/100th of a second. This is good because with these kind of speeds you can beasically rule out wind issues with conventional firearms. The Navy plan to do seaside attempts in 2016