7mm-08 has roughly the same killing power as 308.
No mule deer but I did shoot a 300+# boar hog at about 350 yards and it dropped him 1st shot with a 162 gr amax over RL17.
Blew a hole out the other side about 2" in diameter.
Not a 120 gr TTSX although I have loaded that bullet, just nothing stepped in front of it.
Barnes are tough penetrating bullets, but I think out west I would move up to a 145 LRX over RL17 loaded long and hot for more BC/SD.
Should be able to get 2800 out of it maxed out.
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