I find that, for myself, the older I get, the less enamored with the big cartridges I get. My primary hunting cartridges are the 6.5X55, 7mm Mauser, and the 270 Win. These do everything I need, up to and including elk. Although the cartridges you mentioned were primarily designed for the AR, they do make wonderful "deer" cartridges in bolts and singles shots, along with the AR. Everyone has their own idea of what is perfect, so there will always be arguments.
