In 1954 TRUMARK? introduced the first ammo that was really fun to shoot. The Tracer Brand Ammo is a must. White marbles reflect light so that the eye can "trace" the ammos path like a tracer bullet. Seeing the ammo clearly as it heads toward the target makes it easier to become an expert shooter. The bright white color also makes Tracers easy to find so they can be shot many times. The tracers large 1/2" size is easy to grip so that the power bands can be pulled smoothly with less hand strain. Use Tracers for target practice and quickly improve your scores.