RAD175 said:

With the passing of IMR 4007SSC there is once again a extruded powder void at the H380 burn rate. I used this powder extensively in my 220 Swift and it was ideal for 50 & 55 gr. bullets. It provided exceptional velocity and lower pressure and standard deviation than any of the ball powders and even though it was not labeled an "EXTREME" powder it had less temperature sensitivity than those ball powders. Perhaps when this powder shortage/availability issue passes or if we make enough noise Hodgdon will offer another powder at the 4007SSC burn rate ... maybe even an "CFE/EXTREME" version.
I called them last Wednesday, and they said there were no plans to replace it with anything.
I blame the poor sales on Hodgdon themselves. It is one of the most outstanding powders for the 22-250, the .220 Swift, 6mm Rem and 243 with mid to heavy bullets, and Hodgdon did absolutely nothing to advertise it or promote it.
I will buy all I can find for the moment, and worry later.
But PLEASE, Hodgdon, don't give us a CFE version (Gag!).