http://www.dagammo.com/shop/Andersontech.pdf
worth the read, but for those too lazy, they ran 2 rifles in a 5000 round torture test. The steel ammo rifle had a broken extractor but couldn't be determined that steel ammo was the cause as extractors break sometimes even with brass ammo. Chamber "sticking" was remedied by allowing rifle to cool and could be the spec of rifles used. The brass ammo rifle had to have gas rings replaced about 3 times due to excessive wear and finally a carrier replacement towards the end. No more noticeable wear was found on steel vs brass. moral of the story, it takes a metal of equal or greater hardness to wear a metal, the steel used in casings is softer than that used in most components. Don't be afraid of cheaper steel ammo
worth the read, but for those too lazy, they ran 2 rifles in a 5000 round torture test. The steel ammo rifle had a broken extractor but couldn't be determined that steel ammo was the cause as extractors break sometimes even with brass ammo. Chamber "sticking" was remedied by allowing rifle to cool and could be the spec of rifles used. The brass ammo rifle had to have gas rings replaced about 3 times due to excessive wear and finally a carrier replacement towards the end. No more noticeable wear was found on steel vs brass. moral of the story, it takes a metal of equal or greater hardness to wear a metal, the steel used in casings is softer than that used in most components. Don't be afraid of cheaper steel ammo