Need some AR help....

[NightShade]

It probably also has a lot to do with how tight the chamber is to begin with. An old reamer that has worn down a bit and is on the tight side of spec could have problems vs a barrel that has a new reamer and may be a bit looser.

I have only shot brass through my ar's and especially with the 300 blackout everything I have is reloaded anyway. My 5.56 is a match grade barrel so I would rather not put steel through it anyway and I have never come across 300 blackout rounds in steel cases so I doubt I will have a problem there.

 

[Droff]

Interesting thread I didn't know I was going to start.....
I was shooting Herter's ammo BTW, I haven't shot any Tula steel.

 

[Mr10mm]

Only AR platform I own I would ever consider running steel through would be the e2 chamber on my POF. But stil would never really do it. Running steel ammo is like buying a corvette but running e85 regular to save money. Sort of silly

I run E85 in my corvette, its ~107 octane. Not to many places I can fill up with race fuel.