This might be the dumbest question I've ever seen posted on the fire. A true or false question about an excellent bullet in a well known elk killer? Did you not have anything more stimulating to do when you wrote this little snippet of genius? What's next - "the best fruit chewy candy is starburst, not skittles, true or false...."
The best elk cartridge is whatever you like to use that kills an elk - I could give a rats ass whether you use anything from .243 up to .500 nitro express. Dead is dead, there is no "better dead".
