So let me pose another question. Is the 90 grain .224 SMK with an sd of .256 good to go on elk at 500 yards? For long range hunting you need energy, momentum, and bullet construction such that it can make use of those two things. If the BC sucks it will not have those components when it reaches the target. If it is not big enough and launched at a sufficient velocity it will not have those components when it reaches the target. If it does not have them it will not make a large enough wound channel do dispatch the animal in a timely fashion.