Just noticed that Nosler added data for Ramshot LRT (Long Range Tactical) for the .264 Win Mag / 140-142 bullets combo and Western Powder has some data:
I'm wondering the same thing but not much out there on it. Was hoping to use it as a slower option to Retumbo to pull a little more speed out of my 26N. Hoping it's at least as temp stable as RS Magnum too.