For the same caliber depending on your skills ans tools there are two way toward accuracy. The first one is to select heavy bullets like 175gr Sierra MatchKing in .308 to reduce the amount of wind corrections but you will increase your maximum ordinate in order to hit the target. With a 155gr Palma round your trajectory will be flatter but more prone to wind drift.
In any given caliber there are many choice for bullet but it depends on you for which variable you want to reduced while increasing the other.
Another example to support my though. In the military, the 5,56mm has a flatter trajectory than a 7,62mm up to 550 meters. The 5,56mm is normally used with light machinegunner and rifleman who rarely possess any rangefinding capability expect their own guess. This caliber is more forgiving for range estimation error but is more prone to wind deflection at range beyond these two kind of infantryman but a designated marksman may use this round to its maximum potential up to 600 meters.
The 7,62mm is mainly use with general purpose machine guns and sniper rifles. The users of these two weapons usually possess laser rangefinder or other tools (such as M22 binos with reticle, Mils dot, etc) to get the correct range prior to fire. They usually engage at further range than the 5,56mm users so that is why they have those tools. They must take wind correction into account (expecially the sniper) but the caliber they are using is more forgiving (even more with the .338 Lapua which requires roughly 50% of wind corrections compare to the .308 WIN).
Lighter bullet goes flatter and heavier bullets are less prone to meteorological (Barometric pressure, Temperature, wind).
