I'm not so surprised about the .270WSM because Remington didn't have a .277SAUM cartridge, but I am surprised at how they succumbed to the pressure for the .300WSM because that was their head competition for their .300SAUM.
I haven't seen the Remington website yet, but I wonder if Remington customized their actions just for the WSMs because they are not true short action like the Remington SAUMs.
Zachary