Well, I went to Magnum Research's web and found under FAQs', the proper way to shoot the Desert Eagle!
I was definately "limp wristing" in the past so I went out into the arroyo with three mags loaded with the Magtech 158gr. SJSP and fired all three in rapid succession with out one hiccup using the suggested shooting technique.
Before this I couldn't get thru ONE magazine without a jam or half-lock
However, the Blazer rounds (aluminum cased) still had to be manually cycled each time! Oh well!