Going by what you are looking for(not over 500yds and only those factory rounds) I would use the 150 grain ablr if your rifle likes them. They may be softer than standard Accubond bullets but they are still bonded and the elf-x are a long range standard cup and core bullet so they won’t hold...
Another vote for 100gr btsp interlock. Shoot really well out of my 1:10 twist .243 tc venture with a max load of imr 4831. Sst’s work to but are more destructive to meat and don’t hold up as well if bone is hit.