Rules of the road: with any given cartridge and a full powder charge, the lighter the bullet, the faster...

Rules of the road: with any given cartridge and a full powder charge, the lighter the bullet, the faster the muzzle velocity and flatter the trajectory out to roughly 500 yards. The heavier the bullet, the lower the MV, but higher the downrange energy. Wind drift is minimized with the heavier bullets IF they are spire pointed. Weight plus shape (form factor) measured collectively as Ballistic Coefficient determine efficiency, trajectory, wind deflection and remaining energy. Different bullets increase the versatility of a cartridge. These, from 110-grains to 180 grains, are all for .30 bores. Bullets .308.jpg
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