Of the ball powders, W748 is the one to use in the 30-06 Garand and it works best with 150 -155 grain bullets, but can work for 168 grain bullets.
Heavier bullets not recommended with it.
Several manuals recommend 48.0 grains with a 150 grain bullet for the Garand.
This is fairly mild load.
50.0 grains is about max.
49.0 grains is fairly accurate and works the action and gives just under 2800 fps, or around 2790 fps, close to factory military ammo.
50.0 grains is getting up there and gives around 2820 fps, a bit warmer than factory ammo in velocity, but still easy on the gas system.
The Hornady manual gives 48.4 grains as max for a 168 grain (A-Max) bullet.
That sounds like a 150 - 155 grain bullet load though.
There are some mistakes in the Hornady Garand data too.
A friend uses 47.7 grains a 168 grain SMK and it is fairly hot.
I like 47.0 to 47.5 grains with maybe 48.0 max with a 168 grain SMK. (usually 47.0gr.)
In 30-06 with Garand weight bullets, W748 loads similar to IMR-4064 in charge weights.
IMR-4064 will outdo it with 175 grain bullets though.
W748 seems better than BLC2 which can be all over the place.
47.0 grains of H335 can be used with 150 grain bullets, but pressure can climb quickly.
I think Hornady shows a max load of 46.4 grains with a 155 grain A-Max bullet.
I only tried and used H335 when I wanted a one-powder powder for 223, 7.62x39, 308 and 30-06.
Hot magnum primer required.