April 7, 2010: The U.S. Department of Defense recently purchased over three million rounds of 12.7mm (.50 caliber) M903 SLAP (saboted light armor penetrator) ammunition. SLAP is a 7.62mm tungsten ...

Ammo Review: Federal's New 7mm Backcountry Could Revolutionize Rifle Ammunition. Thanks to a unique cartridge case made of a new steel alloy, the Backcountry is not just a better long-range 7mm.