Is that supposed to be a 129 grain bullet at 3250?

Like I said you are payin' for your own barrels and powder, feel free to burn 'em up as fast as you want, but you still need a long action to get the most out of the .284 case, just like the 6.5 Rem Mag. Furthermore since it takes the .264 Win. Mag. 26" of barrel to achieve 3150 fps with a 140 grain bullet I suspect that not EVERY 6.5-.284 can reach those velocities.