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<blockquote data-quote="Daryl Licht" data-source="post: 2006691" data-attributes="member: 3330">Steel cased ammo won&#039;t hurt your AR, especially one like the 6920 that has a chrome lined chamber.&nbsp; Thinking that a chrome lined AR chamber with steel cased ammo will wear any faster than a chrome lined AK chamber with steel cases defies any resemblance to basic reasoning.&nbsp; The extractor might see more wear.&nbsp; In four rifles of varying price point and quality I have not seen it.&nbsp; Even the two that are not chromed and have seen a couple of thousand rounds each of steel cases, neither show abnormal extractor wear.The steel case does not expand to seal the chamber as well as brass does and the chamber will crud up quicker.&nbsp; Clean it a little more frequently and it should be no problem.FWIW, I&#039;d prefer to shoot the brass stuff as well since it&#039;s generally better ammo, but for blasting the steel cased make$ $en$e.</blockquote>

[QUOTE="Daryl Licht, post: 2006691, member: 3330"] Steel cased ammo won't hurt your AR, especially one like the 6920 that has a chrome lined chamber. Thinking that a chrome lined AR chamber with steel cased ammo will wear any faster than a chrome lined AK chamber with steel cases defies any resemblance to basic reasoning. The extractor [I]might[/I] see more wear. In four rifles of varying price point and quality I have not seen it. Even the two that are not chromed and have seen a couple of thousand rounds each of steel cases, neither show abnormal extractor wear. The steel case does not expand to seal the chamber as well as brass does and the chamber will crud up quicker. Clean it a little more frequently and it should be no problem. FWIW, I'd prefer to shoot the brass stuff as well since it's generally better ammo, but for blasting the steel cased make$ $en$e. [/QUOTE]

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