Swaged Lead Balls. Speer offers a variety of lead balls for the traditional round ball shooting enthusiast. Great case is taken to ensure smoothness and shape uniformity for better accuracy over the long haul. Lead balls are packaged in a unique yellow plastic box for added protection and convenience. Weight: 177 Grains Diameter: .490" Caliber: 50 Thompson Center Hawken Manufactures Website Address www.speer-bullets.com Warranty Information Warranted against manufacturers defects.