Ok so I'm trying to figure out what caliber to make. I want something BIG, but I'm building off a short action savage small shank with a detachable magazine. I would like to be able to use the magazine and actually fit the loaded rounds in it. I would like this for long range elk maybe out to 1k or so. Some thoughts are: 338/300wsm 7mm Dakota Anybody know the COL that can be used effectively in a savage short action detachable mag?