From: "Peter Webb", [EMAIL PROTECTED] Gentlemen....... I keep hearing it suggested that the 5.56mm NATO round (.223Rem) offers superior penetration to the 7.62mm NATO. IIRC, this claim is based on a comparison test utilising DISsimilar projectiles. Can anyone confirm this?,,, and what tests have been done using proj's of identical design in the two different calibres? I know of at least one conflict in which Australian troops came to prefer SLRs over M16s due to the capacity of the 7.62mm to penetrate cover (rubber trees) and kill the enemy behind it. (That and reliability, but I understand that the '16s have improved since then.) Regards all,,,,,,,,,,,,,,,,,,,, Peter Webb. -- The SS109 apparently has superior penetration to the 7.62 NATO on certain things, such as a standard NATO steel helmet (that no-one uses anymore), however on trees and brickwork, stuff like that 7.62 NATO has the edge. That is the reasoning behind using the 5.56mm for infantry squads and GPMG in 7.62mm for more heavy duty missions. I think it depends on what you want to get through. The steel tip on the SS109 provides better penetration on some types of thin armour, but the 7.62 NATO has more mass, thus more momentum, and is better on other materials. It's a bit like 9mm v. 5.56mm in that regard. 9mm will penetrate far more deeply than 5.56mm, but 5.56mm will penetrate certain types of body armour that 9mm won't. I am sure Nick or someone can quote the NATO tests chapter and verse. Steve. Cybershooters website: http://www.cybershooters.org List admin: [EMAIL PROTECTED] ___________________________________________________________ T O P I C A The Email You Want. http://www.topica.com/t/16 Newsletters, Tips and Discussions on Your Favorite Topics