...The Cowboy Action soft lead bullets produced by DCB have proven to greatly diminish the fragmentation and shrapnel normally associated with harder alloy lead. In addition, the soft cast plain or flat based bullets contribute to better gas sealing and reduced leading and fouling in the bore.
DCB is convinced these soft cast, plain based Cowboy Action lead bullets will increase accuracy and improve scores for any active and competitive shooter using low and standard velocity loads. The company is dedicated to producing cast bullets only for Cowboy Action Shooting and Old West applications. Consequently, all of their bullets are cast using soft lead, and the plain base (authentic) design....
http://www.cowboybullets.com/