I can tell you I've got a big hankering for one or the other, or maybe both.....I've got a Weatherby .308, but been thinking of selling it to get the Encore barrel. I've got a buddy thats a police sniper/instructor, and he brings me a bunch of brass after they go out to shoot or where he teaches a school. Probably got about 500 pieces.
On the other hand, I've got a ton of 7mm bullets and the .280 just looks interesting.