Actually, I've been reloading for a 7mm Mag for about 30 years. My favorite bullet for general usein a 7RM is a 154gr Hornady SP.

It isn't too tough to open up on deer/antelope size game, and has enough integrity for elk. As a cow elk permit is a meat permit, and most guy in their 70's are pretty careful shots, there's really no need for premium bullets, if there ever really was. I've also had very good luck with the Hornady 162gr BT if more weight gives you confidence. I think the best comparison I can think of is the fact that the 154gr Hornady has the sectional density as a 180gr/.30 caliber bullet, and that's a well accepted standard.

I use NP's from time to time, and at one point used them almost exclusively. With experience, I've come to feel that if I need "more", I can pick a bigger bullet, from a bigger hole. Since I bought a couple of Whelen's, my 7RM has seen a lot less use.

Experience is what you get,
When you don't get what you want ;-0