There are no factory loads or any reloads that are considered elk loads or didn't you read this thread!!! Just because you kill deer with you .243 and they fall over doesn't mean it will happen like that with an elk that can weigh 500# to 800#+. Have you even hunted elk to see how big they are? The best you can do is look for a good bonded bullet, but if you have a bigger rifle please use it and leave the .243 for antelope and deer!