I asked Nosler the same question a few months ago, and the response was basically the 250 AB's were still in the line-up, and would be produced sometime.
In the meantime I kept my eyes open and in a local store happened to come across several boxes, probably because they were on a shelf only maybe 18 inches above the floor, in a dim aisle. I bought two boxes, which along with the rest of my 9.3 stash should last the rest of my hunting life, but out of curiosity looked again the last time I was in that store. The rest were still there.
