The yield is roughly 60% on black angus ( which I assume would be similar to red angus).

So a 1000 lb. Angus steer on foot should dress out to approximately 600 lbs.

Angus dress out better than most beef breeds due to its shorter legs and smaller bones in general.

Again, sorry it took so long to answer your question.

Below you will find a chart on Angus Beef detail loss % and % of the basic cuts from the beef.  Just click on the photo to enlarge.  It will take a few seconds (10) to 15) to open.