Sellier and Bellot has been producing cartridge ammunition since 1825. The year 2009 saw one of the milestones in the history of the company, the Brazilian company Companhia Brasileira de Cartuchos S.A. (CBC), also known under the name of Magtech, became the owner of Sellier & Bellot. Another group member is the German company MEN, a globally renowned producer of small-arms ammunition for the military, police, and commercial markets. Due to the merger into one group, the mentioned companies have become more competitive and rank among the largest producers in the world.

Today Sellier and Bellot produce ammunition using high quality components which is the choice of hunters, competitive shooters, law enforcement agencies and militaries around the world. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.

Sierra GameKing Bullets are designed for hunting at long range, where their extra margin of performance can make the critical difference. GameKing bullets feature a boat tail design to bring hunters the ballistic advantage normally found with match target bullets. The streamlined tapered base of the boat tail greatly reduces drag, which results in higher retained velocity, greater striking energy, a flatter trajectory and less wind drift than comparable flat base bullets.