I have always liked 275-280 gr. bullets in the .44 Magnum. There was a reason that Speer made the 270 gr. its flagship bullet in the .44 magnum. It was also Winchesters .44 bullet weight of choice in the Black Talon ammunition. Barnes made a great .44 cal. 275 gr. bullet in its old original series. I ran some velocity tests on Black Talon factory ammunition some years back. The 270 grainers generated 1330 fps out of a 6.5" custom revolver and 1411 fps out of a 10.5" Super Blackhawk, which was faster than Remington, Norma, or Starfire 240 JHP factory loads in the same gun.