Does more inertia make a projectile travel farther?

Does more inertia mean that a projectile will travel farther? For example, if I have two nerf darts, one with more mass, would the one with more mass travel farther because it would have more inertia? or does it not travel as far because the gravitational potential energy is greater? What I thought was that because the amount of force applied to the dart by the nerf gun is the same, the heavier one would travel less far because there is more gravitational potential energy even though they had the same initial applied force. Please clarify this for me!