The 264s I have seen used were all used against mule deer, and I can tell you that they were accurate and had a LOT of range, so I am sure you'll be fine using one on elk, as long as you shoot "elk bullets", not target bullets or any bullet that comes apart and completely sheds it's jacket.
Yeah, don’t use one of those 130 grain Berger VLD’s or 139 grain Scenars. For sure.
