Telegraphy Linky - size DOES matter "The study, co-written by Nicholas Drummond, a strategy consultant and ex-Welsh Guards officer, described British soldiers' rifles as "not much more useful than a peashooter". Taliban marksmen use powerful 7.62mm ammo for their AK47 machine guns, according to a report of the study in The Sun. Mr Drummond told the newspaper that a British soldier couldn't attack the Taliban "with any certainty that if he hits the enemy he will kill or incapacitate him." The study claims the ammunition is easily stopped by car doors. It added that Javelin anti-tank missiles, costing Â£100,000 each, are often fired at lone gunmen. Only one in four British, US and German troops has been issued with guns using 7.62mm ammunition. The report calls for guns that take larger ammunition to replace all standard-issue SA80 rifles, which many believe were exposed as inadequate in Iraq in 2003. "