Editing .177 caliber (section)

==Relationship between caliber and trajectory ==
If two guns fire pellets of different weights, the gun firing the lighter pellet must fire it at a higher velocity to achieve the same [[muzzle energy]].  This is an important consideration in locations where air guns are [[Air gun laws|legally restricted]] by muzzle energy.  Because a .177 pellet is lighter than a larger caliber pellet of similar design, the .177 pellet can be propelled faster and therefore on a flatter [[Ballistics|trajectory]], without exceeding the legal limit on energy.  However, because the lighter projectile has a lower [[ballistic coefficient]], it loses its initial energy to air resistance faster than a heavier, slower pellet.  Therefore, a heavier pellet (typically of a larger caliber) may be preferred for hunting.