I've burned up a dump truck full of 4895 shooting an M1a, and M1 Garand in Service Rifle competition. It was for years "The" powder for both of these rifles. In my experience, the H4895 grouped a tiny bit better than the IMR, the S.D. over a chronograph was a bit less. But I've used both, sometimes it just came down to what was available. Charge weights for any given bullet weight are very close, but not exactly interchangeable. But I doubt you'd get in any trouble using the same data for either. As always, load a few, check for pressure signs, and of course accuracy, and have at it. Works very well in a 5.56/223 also, by the way. One of just a few powders I only buy in 8lb jugs.