ROCHELLE,
I've used the Sierra 165 grain and 180 grain SBT as well the Nosler 165 and 180 grains partition. All four have given good results. If the elk had been hit with a 100 grain .243 Win I think would have dropped just as quickly. I'm a firm advocate of bullet placement. When properly hit with a reasonable bullet, game dies. When gut shot with a .375 H&H, they run off. I'd suggest the the Nosler Partition. It will expand at long range and penetrate at close range. I hope that this will be of some help.