For pure ballistic performance at long range the 6.5x284 will best the other calibers you mention, and you will feel little difference in recoil. There is a reason this caliber holds many of the records. The price paid will be barrel life that is about half or less. I have seen the Savage Target series rifles win matches at our club competing against full customs on several occasions. My buddy has the Target Model in 308 and is consistenly in the top rankings. A nice thing about the Savage design is that you can easily replace a barrel on their own with a minor investment in tools and gauges. If a shooter is shooting high volume, this makes the barrel planning process a whole lot easier, and cost effective if your not a well trained gunsmith. I own a few Savages. Because my competitive shooting is typically at the mid ranges, 600 yards or less, I use a 260 LRP. This rifle is exceptionally accurate and required no modification to achieve consistent .25MOA or better. I also have a Savage Long Range Hunter in 6.5x284 that I use for hunting out to +1000 yards that shoots as well. For this use, at 60 years old, I will probably never change the barrel. If big game hunting is on your plate with this purchase, the 6.5x284 will have the edge over the other choices at +700 yards.