Traveller has always been known for it use for slug throwing weapons in preference to energy weapons. At times it doesn't feel very futuristic. I mean how many ways can we deliver a high projectile target down range.
Well now we know.
The Army's XM-25 rifle.
The basic idea is that the rifle has a range finder and shoots a 25 mm (1 inch) shell. Inside the shell is a cheap computer chip that can track how far it goes before it detonates. This allows the shooter to cause the shell to explode BEHIND cover like a wall or embankment.