I have a tikka t3 300wm I'm using to build a 300wsm on. I'm waiting on my carbon six 26inch 300wsm barrel to come in. I already have my stock, the stockys longrange carbon fiber. It is cut for the cdi bottom metal. My question is about the bottom metal and magazines, cdi has the option for long or short action. It's my understanding that the tikka actions are the same length. I'm guessing the bottom metal is different to account for differant size magazines. 300wsm would be short action, but would I be able to use 300wm magazines for a 300wsm, I would like to be free to seat bullets as far as I would like.