155 mm HE ER FB-BT (OFd M3)

High Explosive Extended Range Full Bore projectile with (Boat Tail) is a long range projectile of modern design where the bourrelet is replaced by four projections, called „nubs“.

The projectile has the Boat Tail screwed on its bottom, which ensures range up to 32,000 meters when fired from 45 caliber gun and up to 33,000 meters when fired from 52 caliber gun.