In this study, two dimensional model of a single-coil reluctance launcher was constructed via Maxwell software which uses Finite Elements Method as a solver. The effects of projectile parameters on muzzle velocity were examined with the constructed model. Projectile parameters were determined when the muzzle velocity is at its highest value. The studied projectile parameters are the material, diameter and the length of the projectile. Analysis of the reluctance launcher was carried out for each parameter. As a result of the analysis it was determined that the velocity of the projectile increases as the relative magnetic permeability of the material increases. Higher velocities are obtained when the diameter of the projectile is the half of the muzzle diameter and the length of the projectile is equal to or a bit longer than the length of the coil. The highest velocity was obtained with the 8 cm length, 3 mm diameter projectile constructed from 1050 material. The highest velocity is 19.76 m/sec. The tube-type projectile was also studied with in this study. In contrast to the past studies, It was determined that the velocity of the projectile increases when it is tube type. The obtained velocity value is 22.08 m/sec. in this case. 250 V DC voltage is applied to the model.