Kudos to the firearm industry for producing and marketing their latest and greatest. It keeps the wheel rolling. The paper punchers and long distance competitive shooters, need every advantage to accomplish their goals. When you shoot over 500 yards, that’s where higher BC bullets excel. Paying $5 per cartridge or more is not a recipe for lots of practice unless you have deep pockets. Finding the right ammo at a fair price is a challenge. Getting belted by a .300 PRC or it’s ilk is not fun. The competitive shooters have heavy rifles to absorb recoil but are not practical for chasing elk in the mountains, you can, but do you really want to. As a young stud, you can do it as a challenge, but do you want to when the years add up. What are you gaining.
The cartridges you have already, such as the .270, .30-06 , 7 mag etc.. can do the job and do it well. If you are a skilled shooter the only variable is the rifle. Take your rifles and shoot them at 400 yards and see their accuracy potential from field positions. Tweaking them to get your desired accuracy and function to your satisfaction. Whether in replacing some parts, skilled gun smithing, optic change etc… don’t feel you have to spend lots of money. 1 moa rifle will give you 4” at 400 yards, that’s plenty for many. Maintain your skill and stay in shape. The elk in the mountains are challenging you, go get them
Best of luck to you.