There are a lot of guys here that use SMK's for hunting. A great many are using the 300gr SMK in .338 for long range hits on elk and deer, me included. Do some searches and see how many people are hunting with them. This subject has been debated in depth so I am sure you will be able to find more than enought threads to read.
Ditto here with 338 RUM and 300 SMK's at 900/1000/1100/1200 yards on deer sized game. One shot and DRT.