Denver had a reputation of making very good brass, and loading good ammunition. Most of it went to aircraft machineguns, and lesser quality to land machineguns. The poorest quality, as good as most makers, for training at posts in Texas and the west.
FWIW, an older shooter told me that Denver was a brand new plant with all new equipment and few trained workers. So the production line ran very slowly for the first couple of years. Remington, on the other hand, made all .30/06 at Kings Mill, OH, in the old Peters plant. They dug out the old equipment that was worn out in WW1, repaired and used it. Needless to say, most of it was used for training ammo.