First off, welcome! There's a ton of knowledge here. Lots of shooters with tons of experience. As far as your question goes I echo the statements of a couple others. Your caliber is adequate for most every need in North America provided the gun shoots well. The 7RM is a wonderful all around cartridge. IMHO any hunting rig should be able to hold at least 1 MOA or better. Long range maybe you'd like to be a bit better but the biggest issue is consistent mv's so if you're not loading your own, buy the best ammo possible. If the gun and ammo are in good order then put a good optic with better magnification on top and practice, practice, practice. Additionally, my personal experiences have proven to me that if I want to hunt at 600 for instance, I need to practice at 800. Get adept at making wind calls and knowing exactly what your shot will react like at distances beyond where you intend to hunt and you'll become a better, more confident hunter. If you really need to have another gun (and who doesn't need just one more), then I'd look at these calibers: 7RM, 7RUM, 28 Nosler, 300 Win Mag, 300 RUM, 30-378, 30 Nosler, 300 PRC, 300 Norma, 338 LM, 338 Norma. There are dozens of other options and although you could go smaller in caliber as well, I'd recommend staying with the energy factor you're familiar with or greater. Just my opinion, but what you don't want to have happen is setting up a new gun for hunting purposes but having that thought in the back of your mind wondering if you have enough gun. Any of those calibers I listed, and plenty others, are going to work great. Consider these factors; cost to buy, cost to shoot, availability of ammo, and recoil management. Chances are you'll narrow down the list pretty quick with those 4 factors. Best of luck and happy shooting.