Make sure that you get the .458 brass you are looking for. We offer both .458 SOCOM used brass & .458 Lott used brass. The .458 SOCOM was orginally developed for Task Force Rangers who were dissatisfied with the 5.56 NATO cartridge used for the M4 and M16 rifles. If you are looking for powerful military grade rifle brass the .458 SOCOM is what you are looking for. On the other hand if you are big game hunter looking for the right used brass ammo then the .458 Lott is what you need.