Projectile-enemy collision

In my first person shooter little project, I have implemented some spheres as the "enemies" and I have used a little sphere as the projectile.
I have replaced the code of sio2PhysicsCollisionCallback for a new code that, in case of projectile-enemy collision, calls to

Code:

sio2PhysicRemoveObject( sio2->_SIO2physic, _SIO2object0 );
sio2ObjectFree( _SIO2object0 );


for the two objects (the projectile and the enemy).

When I execute the "game" the collision is detected but I takes too many time to visually eliminate the enemy from the scene.

There is a better way to implement the projectile-enemy collision?

Thank you very much!!!

if the weapons in your game shoots small bullets(not rockets) you could just use a ray to test for collision unless you want the player to see the bullet. In this approach you also don't need to create a bullet object

Thank you, I'll try the ray test