It's not new, not flashy, not ultra mag nor short mag, it's the 30-06. Economical and versitile. As I have gotten older and got my son through college and law school, I can now afford to play. My hottest round is probably the 375 H&H, but really llike the other smaller classic cartridges such as 7x57, 6.5x55, 38-55, 45-70( that one will really reach out with the right gun and bullet, even shooting black powder) 405 Win. 22 Hornet. 7.5 Swiss. and of course the 30-06 I recently acquired a classic Mauser sporter in 9.3x57, certainly no hot rod cartridge, 286 gr bullet at right about 2000 fps, but will have minimal meat damage as compared to newer very high velocity cartridges. Back in my college days, I only shot one rifle, my 30-06 and shot it very well, now 40 years later with so many things to play with I do not shoot any of them nearly as well.. Part of that is 40 years the other I attribute to the old saying "beware the man with one gun".
Use a moderate velocity cartridge and learn to shoot it well and shoot it a lot.