- Oct 16, 2017
30 Caliber 7mm WSM - I'm sure it's been done. I missed the boat & now it's caught my Eye. Can we still get any 7mm WSM brass?? What are the Performance figures on this combo in a Long Action? // UPDATE: I have decided to pursue the Wildcat 300-WSM SUPER or "300-SMX" for short. This will require 300-RUM Brass or the User may choose 7mm Blaser Brass & Fire-Form accordingly.