I have reloaded a number of bullets in front of different powders for my M760. I started loading for it in the late 1950's. I settled on surplus 4831 and then H4831 to push 150 grain bullets out the barrel. I used a Norma 150 grain match bullet for a number of years. It was very accurate and left nice exit holes. I have had very good luck with Remington bullets, Nosler solid base, and Hornaday bullets.
I started out loading IMR4064 and ran into pressure problems real fast. I found that I had better results with IMR4350 and H4831. I settled on H4831 because of lower pressures, better case volume, accuracy, and lower cost. The cost savings on Surplus H4831 is now gone, but it is my powder of choice.