Lilja says a #3 in .308 is 3.11lbs. I'm guessing a .284 is fairly close to that as their formula adds and subtracts at .308 so while the .284 will be a heavier barrel inch for inch, their formula also subtracts more....so I'd call it a push....you could also shorten the shank from what they have too.
IIRC a 700 LA with all the fixins is 2.75lbs so I think that puts you right at about 8#s
