I shoot a 300 WSM, which is similar ballistic wise for all intents and purposes. For elk, I use a 200gr bullet if it's a lead core that inherently will shed some portion of its weight, which they all do, and 180ish gr bullet for the monolithic constructed bullets like the Barnes. The thought process behind this is that I'd like to error on the side of velocity when dealing with the mono constructed bullets to ensure I get ideal expansion and energy transfer since they will retain almost all of their weight on the terminal performance end and give good penetration. Likewise with the 200gr lead cores, I know that I'm going to lose a certain percentage of weight in these as the energy transfer happens, giving me a similar amount of penetration as the mono's en the end run.
For what it's worth, I've been shooting the 175gr LRX for elk the last couple years with great results. Before that, I was shooting the 200gr Accubond which I switched to from the 180gr Accubond because I wasn't getting the penetration I wanted with the 180gr version. All that being said, the 180gr Accubond and Partition have put far more elk meat in my freezer than the other two combined, so find any of these bullets talked about in previous posts that shoot well in your rifle and you'll be good to go.