Stolen from Lightfighter and Dr. Gary Roberts. http://lightfighter.net/eve/forums/a/tpc/f/7206084761/m/60210131/p/1 The Army is going to be replacing green tip M855 with some gay ass "enviromentally friendly" ammunition, despite the fact there hasn't been any conclusive proof that lead alloy cores in projectiles is causing lead pollution more than the lead salts from modern non-corrosive primers. Just for reference, civilian shooters who get lead poisoning get it from the primers and aerosolized lead salts in the air, not from fired rounds... The new M855 LFS round has had issues with unreliable external ballistics due to the lead replacement core melting, and no consideration was given at all to terminal ballistics: Lose - Lose. http://www.armytimes.com/news/2009/08/army_green_bullet_080809w/ The Marine Corps was considering the lead free M855, but apparently is thinking about large scale adoption of the recently revealed Mk 318 projectile that was designed by ATK/Crane Naval Surface Warfare Center for the FN SCAR/Mk 16. The Mk-318 was designed both with external ballistics and terminal ballistics in mind: Win-Win. It looked like it was only going to be fielded in relatively small numbers with the SCAR, but if the Marines pick it up, that would be sweet. Page 16 of the following presentation begins discussion and detailed review of the Mk 318/SOST cartridge. http://www.dtic.mil/ndia/2009infantrysmallarms/tuesdaysessioniii8524.pdf Cliff Notes: Army is going to moving forward with bullets designed to appease hippies that melt, Marines are considering bullets designed by SOCOM to kill.