I’m thinking that 244 is part of the “clean” enviro friendly push on powders and may replace 231/HP38. My testing of it got interrupted but it showed promise. One thing I did notice was that the recoil felt a bit sharper than 231, But I hadn’t chronoed the two loads, and the 244’s certainly could have been faster. It does seem more energetic than 231 though. I have several to re-test when time allows.