When I got my AR-15 I was told that I should get either get Brass or Steel Case ammo and stick with one or the other, I was wondering why? It surely wouldn't damage anything switching back and forth between the two would it? I got steel case ammo and I have stuck with It and probably will either way, I was just wanting to know it I ever wanted to get some Hornady's or somthing like that.
When I first got my ar i used 500rds of wolf steel but since i heard its bad I only use brass but I did shot 30rds of steel then 30rd brass one time at the range and I have not had any problems with it. I have put 700rds though it 500 steel.
my uncle is a cop and he received't run metal case by skill of his ar. it actualy did reason it to jam, and he cleans it after each decision visit. the element with ars is they are very low tollerance and require softer metals which will push them round esier. by skill of the years, metal will also positioned on down your internals swifter than brass because brass is softer. some mags each once in a lengthy time period wont damage some thing, yet when i wouldnt completely use metal case in mine.
What the person that told you that failed to mention is that steel ammunition is slightly less malleable than brass so it does not expand as tight to the chamber walls to seal the gap from expanding gasses. This causes a little bit of carbon to build up over time and can make brass ammunition get stuck. The simple solution is to shoot brass before steel, or to clean the chamber really good after firing steel ammunition.
Steel cases won't hurt your AR, they just don't expand to seal the chamber as well as brass cases, causing increased fouling of the chamber that leads to failures to extract. If you use steel cased, clean well, and use a chamber brush. You can switch back and forth without harm.
