Frontsight, NO But the most accurate at 600 yds. will most likely be the most accurate one at 100 yds. in the .308 as well as most regular calibers at least. While shooting matches it was a question of economics. 200 yard line = 147 gr. military ammo. The longer range slow fire stages = 168, 173, or 175 gr. quality projectiles.
600 yds. is quite a distance to use in working up a load but if you have a place where you can shoot 200, you can usually see the bullet holes in your target at this range, that would be a good place to start.
Sierra 168 gr hpbt Match, 41 gr. of IMR 4895 or 42 gr of IMR 4064 or W 748, using military brass and Fed. match primers would not be a shabby place to start.
Best of Luck
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