I do have a couple of questions as I too am pretty new to the AR game.
First do any of the various chamberings ( Wilde, 5.56, 223 )have impact on reloadability of the spent cases. For example a friend gave me some once fired cases from his remington 760 that were expanded to the point they wouldn't go into the sizing die. Do any of these various chambers have similar issues.
Second, What is it about the AR barrel/ upper that makes it so interchangeable regarding barrel and bolt mating, i.e. headspace. I read a lot about people that interchange different upper configurations using just one BCG with no headspace concerns. Is there something about the bolt lock up that compensates for different chamber variations or is it that most don't reload so a slightly stretched case is no concern.
Last edited by bangeye; 05/25/16.
