Go spend some time over on Benchrest.com in their 1000 yd threads--see what you conclude. 6.5-284 is far more common than '06 based cases in LR shooting. Its the old short/fat v. long/thin case debate. I am biased in this; I had a 6.5-06 chambered Kreiger barrel that never shot all that well (.8 MOA). I had the same barrel rechambered to 6.5-284, and it shoots better(.5 MOA). Some conclude that 6.5-06AI is sufficiently overbore as to shorten barrel life. I have no first hand knowledge on that, and only varmint hunters and target shooters ever wear out a barrel, so that may not matter to you. If we are talking Remington actions, I also think the 6.5-284 works better on a long action than short, unless you either want to shoot 100 gr bullets or don't mind your bullets seated WAY down in the case. Just get a .284 case, and assortment of 6.5 bullets, and see what keeping them below 2.8" means in terms of seating depth.
