Several sources (Midway being one) who have taken backorders in the past have suspended this practice for the time being. In speaking with a friend who works at Midway this weekend, he mentioned that dealing with those backorders was a "minor inconvenience" before this mess started, and they didn't really mind dealing with them. Since things have gotten so out of whack, they haven't been able to keep up with all the backorders. Dealing with them over the past few months have gone from a minor inconvenience, to a complete nightmare that they could no longer handle. Not just powders, either. You'll see the same thing with a number of other items as well, such as gun parts, that are impacted by the shortages.