I have a 300 WSM in the black shadow,or the super spoter.It is a light compact,well shooting rifle.

As for the short mag cartriges they all prefom well on big game(.270,7mm,300)
I have seen 3 elk killed with the .300 at ranges of 120 yds to 250 all one shot kills.
I have seen 2 bulls killed by the .270 WSM all one shot kills ranges from 50 feet to 160 yds.

I have not seen the 7mm WSM preform,but as I have seen the others then it should be good also.

We all know they can not hold up to the bigger cousins if you handload,but off the factory shelf thet can hold their own.