SGK will work just awesome on an elk if you put it where it needs to go. The good thing is they go where they need to go as long as the shooter is able, as they are a very accurate bullet. They shoot under 1/2" in my rifle.
If you have a 1:9.25" twist or better, even though Berger recommends a 1:8", you might want to try the 180 HVLD or Hybrid. I shoot the 180 Hybrid in mine, and they kill elk with authority. My buddy shot my 180 Hybrid hand loads in his brand new Sako 7RM, and they shot under 1" from a brand new factory 1:9.25" twist barrel, and factory Hornady Precision Hunter, Nosler Trophy Grade both shot 1.25" groups, and HSM into a 4.5" group..