RE: Shoulder or Double lung
Being primarily a bow hunter I have a hard time not looking behind the shoulder.
That said I did kill a 4x5 bull elk with my 338 six years ago that I shot through the shoulder. The bull still made it about 45 yards before he piled up.
The 250 grain custom bonded core bullet that i was shooting I found just inside the hide on the opposite side. That bullet weighed 225 grains after we retrieved it. It never ceases to amaze me on how much energy those animals can absorb and still keep going.
Guess all I can say is make ethical shots regardless and shoot a heavy enough calibre to do the job.
good hunting
Rogue