I 7WSM'd mine this year. Under 100 yards.
7WSM'd a grizzerly bear about a month ago, and he remains dead as hell too.....
I used my 7 wsm this year as well to kill a 56" moose at 6:30 AM opening day at 150 yards . One shot and done. Later that day my buddy used a 6.5 CM to shoot a 51" at 330 yards...again one and done.
Now I don't have as much moose experience as many here with only seeing 70 moose killed with roughly 50 in the last 15 years, but I have not seen them really be the "old warriors" that many have seen.
In my limited experience moose die very easy. Most hit well will take the shot and take a couple steps and then takes roughly 15-30 seconds for the lungs to fill up and they fall over. Doesn't seem to matter if its a 243, 308, 30-06, 300 WSM, 300 WM, 338 WM, 375 HH, or 45/70 by and large the results are the same in my experience.
So take the rifle you like best and rock on and don't over think it.
Oh yeah my 7 WSM is a 27" barrel chassis rifle that is cumbersome as the day is long. I was wishing for my 21" barrel 338-06 or 16" barrel 308, but again it worked out fine. Just not ideal for off hand shots in the brush with a 6X scope haha. I will be building a 300 WSM with a 21" barrel this winter though to compliment the 338-06.
