chris in va,
Yes. I have shot about 40K rounds thru my XM15A2 AR (Bushmaster) with no barrel changes yet. It has a chromemoly 1-9 twist heavy barrel with a wild chamber. Still shooting the stock 10-round mag also (have many others). I detail clean the gun after each shooting session and load my rounds on the low end. I figure there's no sense beating up the gun.
Crime Control. NOT Gun Control.