Our brand new tikka magazines are machined from billet 6061 Aluminum. They fit factory DBM bottom metals and are designed to allow up to 3.410" COAL (Cartridge Overall Length) with the WSM/SAUM, 7PRC and 6.5PRC cases. True 3+1 Capacity with properly incorporated "shoulder stops" machined into the internal magazine dimensions, they prevent bullet tip deformation under recoil.