If you're planning to build off a Tikka and want a heavier barrel contour, I'd lean more towards a 7 SAUM or 300 WSM over a 7 PRC/300WM, as you'll probably run out of mag room if you're wanting to run the long high BC bullets close to the lands.
I had a tikka superlite in 300WM that was 7.5# ready to hunt. That gun was so much fun to shoot, it's now a 9.5# suppressed 6.5 PRC. Been there done that, got the t-shirt, shooting the lightweight magnums. I shot that rifle worse and missed more shots with it than any other rifle by far.
I've come full circle now and it's well worth carrying an extra pound or two in a lighter-recoiling platform. And the animals die just as quickly (or faster) with the newer match bullets. My next build will 100% be a 6 creed unless CO decides to remove the 6mm minimum requirement for big game, and I would go 22 creed.