I shoot a 264 and have so for 22-23 years.. it's my do all, grab & go rifle. Coyotes, beavers, bears, whatever... probably got 3-4 moose to it's credit and I've lost count how many deer. That cartridge has been around since the earliest of days when belted magnums were first developed, it's a tried and true original through & through. I have no doubt whatsoever that the 264 will still be here in 25 more years yet.. not so sure about these other "fad" casings
So unless a guy wants a new rifle and a new caliber just for bragging rights amongst his buddies, that he's on the latest cutting edge of our current trendy market, my vote will always go 264
I shoot a 129ABLR @3250 through mine... benchmark 5r.. it's a one load rifle now by my choice. I've come to be of the opinion its better to save barrel life on a good hunting rig for hunting rather than eat it up playing with every new bullet that hits the market.