The guy I talked with was Rich Machholz. He did say that they saved it for another production run. I also talked with the Starline brass guy (he was hanging out in the same booth) about the 300 Whisper brass.
So yes, I think we need to tell Sierra to save the 240. I managed to find a box of 500 locally for $170, so I scooped it up. Gots to have booolits!