Re: reloading 30 06 for 1000yds
IMR/H4350 can work for the .30-'06, but are too slow for use in the Garand. BTW, it would help if we knew what make and model, barrel length and twist you're loading for.
In the .30-'06 the 168 will work at 1000yd, but as others say, there are better bullets out there. For a number of reasons I prefer to limit bullet weight to 175gr.
For such bullets, consider the following to be max loads for the Garand:
46.0gr IMR4895
47.0gr IMR4064 (there is no such critter as IMR4060)
46.0gr AA2460
46.0gr 2495BR
47.0gr H4895
48.0gr BL-C2
Standard large rifle primers will take care of tubular grain powders, and Win WLR's or magnum primers will work for ball powders. Match primers are optional.
Bolt guns will likely do well with heavier bullets and slower powders, and I refer you to handloading manuals for such loads.
Greg