A little jealous that you are starting in your 30’s and have all the fun of elk hunting in great shape looking forward.

Your rifles will work fine but I like a premium bullets, Barnes TTSX specifically based on one BT failure & lots of Barnes successes Killing stuff & breaking bones. Likely 9 times out of 10 it makes no difference but better to avoid Murphy’s law.

I hunt public land in Colorado a couple of places border ranchers who hate public land hunters & do everything they can to keep them from recovering animals that cross the property line so I shoot a 300 Weatherby that I’m confident hitting targets to 700+ yards & elk out to 600 with no wind. We averaged about 300 yard shots mostly cross canyon so that is what we prepare for. Also a little jealous of big bulls on flat accessible ground - haven’t found that yet but heck half the fun is the challenge & adventure.