Be prepared and practice your shot with a box of 25 Count Byrna 0.61 Cal Pro Training projectiles. Filled with inert powder, our Byrna 0.61 Cal Pro Training Projectiles are the perfect way to practice shooting your Byrna Launcher and practice loading your Byrna Magazines. * Compatible with Byrna CL only. ** Byrna 0.61 Cal Pro Training Projectiles are not eligible for any discounts or promotions at this time.