I do not reload my 300 WSM ammo. I order all my ammo from Copper Creek cartridge Co. coppercreekammo.com I shoot 6.5 Creedmoore, 260 Rem, 7mm 08, 280 AI, and 300 WSM. All ammo from Copper Creek. They load excellent ammo. It shoots .5 MOA or better in all the rifles I shoot.