Bullet for bullet
the .284 has 100 to 150fps+ over the 7mm/08. The next consideration is brass. Hornaday is now making 7mm/08 as well as Lapua. A guy might get lucky and find a bag or two of Win. or Rem. if he looks hard enough. There's one source for new .284 brass,,,,,,, Norma (@ Bullets.com). At this time .284 would be all but impossible to find. 7mm/08 is to be found, though. The 7mm/o8 will fit into a SA, the .284 really needs a medium length action so that bullets aren't buried so deeply into the case so they'll fit into the magazine. For kicks and giggles, think about the 7mm/08 Ackely Improved. You can fire factory loaded rounds in it and the added case capacity of the improved case will give you a bit of velocity gain,,,,,,, in a SA.