There were some feeding issues with some makers early on because fo poor action design, but I think that has been resolved. I have a Sako 300 WSM
that cycles smooth as butter. I'm not an expert on all the action makers and the lengths they offer. In the Sako Finnlight, the throat is too long to allow seating near the lands and also fit the mag. That could be remedied by shortening the throat or getting a longer after market mag or longer action. Sakos have 4 actions in the M85 and as far as I know Rems only have 2 in the 700.
Toss up between the WSM and SAUM. The WSM has more brass options with Norma, but for the 7 WSM you have tio neck up from the 270 or down from the 300 to use Norma.