All of the calibers listed will take an elk inside 300 yards with a TMK or ELDM placed in the chest or low neck. Folks are still using massive cartridges often with bad bullet designs that waste all the extra recoil to make a lame narrow wound channel with pass through. 
I would look at what bullets you already have in loads and how each rifle is setup.
 I would look at what bullets you already have in loads and how each rifle is setup.
 
	 
 
		 
 
		
 
 
		 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		