Plastic Training Cases - Bullet Caliber: 38 - Rounds Per Box: 50 For informal target practice in places with a minimum backstop, finding the proper ammo isn't always easy. SpeerA(R) plastic training bullets and cases make the perfect practice load. Reusable molded plastic cases and bullets powered by CCIA(R) large pistol primers provide an accurate and inexpensive alternative. They are designed for 25-foot shooting. For informal target practice Reusable molded plastic cases and bullets Powered by CCI large pistol primers Designed for 25-foot shooting.