I've been involved with other projects and haven't stayed on top of everything new in the shooting world. Hodgdon has released this new powder for .300 Blackout (.300 Whisper clone) and it appears to be very similar in burn rate to 1680/WC680, which makes it an excellent powder for heavy, long-nose bullets in .500 S&W magnum.
My question is, has anyone loaded this powder down to more modest pressure levels in magnum revolvers? Does it suffer from the same ills as 296/H110 in that you get squibs that leave a bullet in the barrel if you go much below 30,000 PSI?
SR4759 is an ideal powder for people who want mid-power (stouter than Trail Boss) loads in the .500, but it's discontinued AFAIK. Perhaps CFE BLK can fill that role?
JR