beretzs . . . thanks for posting this.
It gives me a chance to clarify my postings on this.
I think the Mashburn is a great round, and I hope to work with one someday.
I personally would far prefer it to any 7 magnum with greater case capacity (STW, RUM, etc.)
The only reason I even posted on this thread is because another member seems obsessed with perpetually dissing the 280AI, while never missing a chance to sing the praises of the 7 Mashburn.
Everybody knows that the two rounds are not equivalent, with the Mashburn having much greater capacity.
But both rounds offer advantages over very similar (and popular) rounds, and the conclusion that one is useless while the other is somehow indispensable needs to be defended. That's why I brought up the Mashburn. Not due to a dislike for what appears to be a very fine cartridge.
I realize that in this case it just comes down to a certain member's love affair with the 270. I imagine that he breathed a sigh of relief when the 280 was underloaded at it's birth. Disregarding all of the measurables favoring the 280 was made much easier.
The SAAMI 280AI changed the situation, and for him I think it's a hard pill to swallow.