+1 for ARin...
Chrome-moly steel barrels are not necessarily chrome lined, but chrome lined barrels are ALL chrome-moly steel.
The chrome lining keeps the barrel from wearing, (breaking-in), but it also locks in any defects that may happen to be there when the barrel is first made.
These similar defects would quickly break-in if you are shooting an unlined barrel.
All the top shooters use un-lined barrels, with the majority going for stainless steel.
Douglas barrels are button rifled, a very easy way to make a barrel.
You simply pull a button through a reamed bore and it cold forges the grooves into place.
This does put some stress into the blank.
Krieger barrels are single point cut, a much slower process (read expensive) involving a tool going down the bore MANY times, but removing a very small amount of steel each time.
This introduces very little stress into the blank.
The less stress, the better, as the accuracy will not change as much as the barrel heats up, and the zero will not tend to shift around as much.
If it's only a $100 difference from the Douglas to the Krieger (which is how much more I charge for a Krieger as well) I would go with the Krieger.
Think about how many rounds you are going to put down the barrel in it's useful life and the cost difference is insignificant.
One more thing to know is that the Douglas blanks are NOT usually lapped.
Krieger barrels are hand-lapped and that makes them foul less and clean easier.
Aggressive cleaning with poor technique is the easiest way to ruin ANY barrel.
Randall Rausch
www.ar15barrels.com