OK, but hold on a second:
The number one argument for the .280 AI is 7mm RM velocities with less powder and less recoil, all in a lighter handier rifle
taylorce, while you are correct that the truth value of that entire statement as a whole, is "false", due to 2 things: (1) there being so many "ands" in there (i.e. lighter rifle AND less recoil at the same time) for the reason you pointed out (magnum action=heavier receiver=equalizing felt recoil), and (2) It just doesn't *equal* 7mm remmag no matter how you slice it.
However, I wish to note that if you don't require the "ands" to all be true, by parsing the statement and then tweaking it some, there is a pretty good benefit
For example, these statements:
1. *Almost* 7mm RM velocities with less powder and less recoil, ceteris paribus (same rifle weight) - and no belt - and 1 more capacity (I think?).
2. *Almost* 7mm RM velocities with less powder and the same recoil, but in a lighter handier rifle - and no belt - and 1 more capacity.
both have "true" truth values, and that's saying something significant.
NOW, which one of you is going to start the ".270 WSM vs. .270 Win AI" thread?