You missed 260 rem ! Easy to get brass , form it from any 308 derived case . More powder capacity the the creed unfortunately can't take the longer target bullets tge creed can in the medium action ( play off a bit more powder) .
Just had one built , my deciding factor was , I have every other 308 derived cartridge in a rifle
People are forgetting the 260 rem which is very silly against a creed which although has definite completion benefits by holding a certain longer higher bc bullet inside a mag , thats irrelevant to hunting use