You can get a variety of propellants to work in the .30-06 but that does not make all of them the best choices. Things can get a little interesting when trying to get max performance with it in the 06 when bullets weigh more than 125 grains. Sort of like max. charges of Bullseye in the .44 Magnum. 3031 is a good choice for cast bullet loads. 3031 shines the brightest in .30-30 & .35 Rem class cartridges.

I did mean 56-57 grains and will edit that entry.

You can usually get max. velocity with accuracy with IMR 4350 and it seems to shoot very well in any rifle I tried it in. Many .30-06 rifles will give less than max. accuracy with 150 grain bullets at max. (3000 fps) velocity. The 165 grain and heavier bullets seem to shoot better. If you back off the gas some with the 150's, that's a different story and IMR4895 usually give excellent accuracy when doing so. It's also the propellant of choice for duplicating military ball ammo loads for the M1. Once again, these are not maximum velocity loads.

If you are having severe accuracy issues with 4895, I would try a different 150 grain bullet.

Bruce