USN Adding HVPs

[tomahawk6]

Hyper velocity projectiles.They will be used by the ships with 5in 54 deck guns.This will add a new level of lethality.

http://www.popularmechanics.com/military/navy-ships/news/a27396/hypervelocity-projectiles-navy-deck-guns/

The Navy is adapting a projectile originally developed for railguns to fit guns on existing destroyers and cruisers. The projectile, which tear through through the skies at Mach 3, opens up entirely new possibilities for standard Navy deck guns, including shooting down missiles.

During the early 2010s, the Navy and defense contractor BAE Systems began work on hypervelocity projectiles (HVPs) for railguns. Fired from guns that used magnetism to accelerate objects to speeds of up to 5,600 miles per hour, the projectiles didn't even have explosive warheads. The kinetic energy punch from an object moving at Mach 7 could cause enough damage.

 

[a_majoor]

This technology is also transferrable to 155mm cannon, so the Army (and Marines in your case) can also take advantage of this. Range for artillery is roughly doubled, so a gun can now reach out and touch someone from 60-80km away.

Add this sort of round to an advanced SP weapon like the FH-77 Archer and you have some serious firepower.