The 280AI is an easier feeding Round than the saum and you can get more in the mag. I am glad I went that route over the saum.
7mm RM is a very hard round to beat.
Not to mention there is a football field of room in the magazine (at least in a standard box 8^)). And the 280AI is a ballistic twin to the 7 SAUM. Same powder capacity too. I am fan.