You know that a 600 - 800 yard shot at elk is extremely unlikely right?

Seasoned hunters with years, even decades of experience have taken many elk, never shooting anywhere near that far...

I'd imagine that even here on the Campfire, land of inflated egos, that relatively few will claim to have much experience with that sort of long range elk shooting. There are some, like Burns, who have made it a science. He ain't normal! grin (John I mean that with all due respect, and a grin on my face)

Seems like you've got several different .30 cal rifles at your disposal. I'd tend to take whichever one, or two, rifles you shoot better, and still carries easily. For bullets, there's a host of 165 - 200 gr hunting bullets avail that will do a mighty fine job on elk. Personally I've been a fan of the Nosler Partition for a very long time.

Now, my elk killing experience is limited, but I suspect you'll be hearing something similar from those guys who make a practice of filling their elk tags year after year.

Best of luck on the hunt!

Regards, Guy