The Nosler 7mm Rem Mag Brass is used to build the perfect load. Since hand loaders need the best, they use Nosler cartridge brass. Since it was introduced in 2005, the Nosler brass line is ready to load. Because it is made with the Nosler philosophy of uncompromising attention to detail, Nosler cartridge brass is created to exact dimensional standards and tolerances. Nosler uses quality materials for maximum accuracy and consistency potential. Because of this, you will notice brass with extending case life. Lastly, Nosler brass undergoes strict quality control. The same as all premium Nosler bullets have experienced for over 60 years.