LAPUA BRASS 243 WIN 100PK - SKU: 4PH6009 .243 Win. A legendary calibre for today"s small game hunting. This case has all the world famous qualities of Lapua"s unrivalled .308 Winchester case. Lapua cases are the best in the world. The base, body and neck of Lapua cases have been designed to maintain exact tolerances over multiple reloading cycles. Advanced metallurgical research and manufacturing techniques ensure that Lapua cases are leaders in uniformity and quality.