.204 to 6mm Creedmoor conversion?

I was offered a model 12 stainless with laminated stock in 204 Ruger at a good price. I have no use for the caliber, so thought about picking it up and converting. I'd like to do a 6mm Creedmoor build. I know a bolt head replacement is needed, but what about the magazine? Is it a simple follower change or is it a completely different mag box? I suppose I could always just do a single shot conversion, or do something simple like a 6X45, but I'd like something a little more capable on game in the deer/black bear class. Thanks.

Bolt head, 308 mag box and follower and a barrel. Tools for removing/installing barrel, gauges.

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Originally Posted by Robinhood

Bolt head, 308 mag box and follower and a barrel. Tools for removing/installing barrel, gauges.

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Thanks! I knew about everything else, was just unsure about the mag box. I may be better off waiting for something in .243, .308, etc. Saves some time and money scrounging parts.

IF that 204 is an LRPV and at a good price it might be worth it.