280's belong in light,svelte,mountain weight rifles that handle like batons....not heavy barreled laminated thumbholes that you wield like a railroad tie....that's like putting combat boots on Michael Jordan......can't think of anything less desireable for an elk hunt.
OTOH, the 7 mag is closer to perfection. This is not a caliber issue...in this case, it's a rifle decision,made easy.....