No experience with the 7x57 but my primary rifle is chambered in 7mm-08 Rem. From what I've read there isn't much difference between the two, especially for a handloader.
I've never hunted caribou but I hear they're smaller than elk. The two bull elk I've killed with the 7mm-08 went an average of zero yards after the shot. A single 140 gr Partition apiece. My dad used a single 140 gr Accubond on his big 5x5 a couple of years ago, but it went 90 feet before it died.
I have a hard time believing there's a nickel's worth of difference between the .308 and the 7mm-08. It's tough to die faster than DRT and I'm okay with 90 feet.
P
Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
