I did not see anything obvious, but im neither an engineer or a mechanic.
Printable View
So fas, so good; you didn't get damaged through the kaboom, Federal was cool and is taking care of the ammo. I'll keep my fingers crossed for your weapon. Is there anyone near by, or anyway that it can get checked before you hit the range just to be on the side?
With an AR, are you referring to a Go/No-go gauge, or using something like the Hornady L-N-L gauge that I use to determine seating depth in my bolt guns? Never really gave measuring headspacing a thought in my ARs due to the magazine limiting the length of any of my reloads.
Bullet length and seating depth determine cartridge overall length. The magazine limits the maximum cartridge OAL that can be fed through the magazine (although it does not limit the length of cartridges that are loaded one at a time). None of these dimensions has anything to do with headspace.