I'm with Hyde on this one.
I have carried a 300 Wthrby for many years and when I started hunting out of state I went to a 340 Wthrby, knowing I would have the possibility of longer shots. I shot 180 Nosler Partitions in the 300 and now shoot 210 Partitions with the 340.
I made a similar shot this year in New Mexico at nearly the same yardage but without the distraction of the pine. I put the shot on the back side of the left shoulder and with collateral damage took out two ribs on entry, top of heart, lungs and two ribs on the exit.
While enough gun is an asset, bullet placement is every bit as important. In the scenario of the picture there seems to be ample area for good bullet placement on the shoulder off hand, even better with a tree rest or sticks.