If you're into loading for general shooting and want to load up with equivalent military powders, W748 is not a bad choice for either the M1 Garand's 30-06 ammo or the M14/M1A's 7.62x51 ammo. However, the first thing you need to decide with the M1, 30-06, M2 Ball ammo is what brass you're going to use. The commercial brass is thinner than most mil brass and so the powder loads are lower, about 2 grns lower, in mil brass than commercial brass. This isn't an issue with the .308/7.62x51 ammo for the M14/M1A.
From NRA's data for M1 Garand, M2 Ball ammo (150grn fmj):
Reprint of the NRA’s, Reloads for the M1 Rifle, Suggested loading data for M1 Rifle. The charges listed are meant to approximate the performance of military ammunition using commercial reloading components, including cases.
Military surplus cases should be reduced by 2.0 grs. from listed amount. Loads using ball powders should use a large rifle magnum primer.
147/150-gr.bullets – either FMJ or HPBT OAL 3.300”
AccAA2460 49.0 grs.
AccAA2520 51.0 grs.
Acc2495BR 50.5 grs.
HercRe-12 48.0 grs.
HodH-4895 49.0 grs.
Hod BL-C2 49.0 grs.
HodH-335 49.0 grs.
IMR3031 48.0 grs.
IMR4895 49.0 grs.
IMR4064 50.0 grs.
Win748 Ball 48.0 grs.
173/175-gr.bullets – M72 or M118 OAL 3.330”
AccAA2460 46.0 grs.
Acc2495BR 46.0 grs.
HodH-4895 47.0 grs.
HodBL-C2 48.0 grs.
IMR4895 46.0 grs.
IMR4064 47.0 grs.
180grain FMJ, SP or HPBT bullets OAL 3.330”
IMR4895 - 43.0 grains
AA2460- 46.5 grains
AA2495- 45.5 grains
H4895- 44.0 grains
BLC-2- 47.5 grains
RL-12- 41.5 grains