I was just planning on going with the 13in barrel in the 44mag. I figured I would have to go with a 15in or 15.875 with internal muzzel brake with the 7mm or 308. I looked at the 7-30 waters too but figured the 7mm-08 would just be easier to find brass for. My 14yr old son also hunts with a 7mm-08 rifle so I already reload for that caliber.